It's a valid question.
What is it exactly, that makes Armstrongism SO appealing to those who fully embrace it's completely flawed ideologies? What is it about Armstrongism that has caused people to completely deny reality in their quest for truth and understanding?
Despite the full brunt of historical evidence which is a free and open library for the browsing, Armstrongist supporters wear blindfolds and earplugs in the face of such dramatic affronts to their concepts and mindless imaginations. Despite the full brunt of hardships and assaults on rightful living, and despite the full brunt of even half-ways intelligent rebuttals to some of their most easily dis-proven theological embarrassments, they continue to relish in the madness of constant deceptions and continual delusion. They do not believe it is deception, nor do they believe it is delusion. To them, it's reality - even though clearly, and without any legitimate dispute, it is anything but reality. It is clearly, and unarguably, complete non-sense - made up by one man, with one vision, and one dream, fueled by vanity, ego, conceit, and power.
With that framework clear - what is it, then, that makes Armstrongism SO appealing to those who support it? It is the clear embracing of the concepts and imaginative dreaming of exactly the mindsets of the one who started it all. Namely, vanity, ego, conceit, and power.
Armstrongism is a fairy tale land of make-believe for many who did not, in real life, achieve, attain, or grasp the lifelong dreams of authority they may have wanted in their human lives to that point. For others, it was an avenue to create within that very structure the very embodiment of real power, using ego, and vanity, and conceit to achieve just such.
For others, traditional religion had, for one reason, or another, burnt them severely - whether it was Catholicism, or Protestantism, or any other form of organized religion which had shown itself, to them, as a fully evident fraudulent system - Armstrongism provided bucketfuls of theories as to why Corporate Christianity was as untruthful as they had observed it to be. With stories of abuse and freshly laid paths that all led to evil and paganism from within their horror stories of Corporate Christianity past, they were more than eager to embrace a different, seemingly refreshing concept of what they took to be a new light of truth.
This new light of truth, in fact - was the spark that all of these people began to fully indoctrinate within themselves, regardless of what exactly their specific reason was. Their leader, Herbert Armstrong, or whichever splinter leader they bought into later on down the road - spoke with enough convincing argument and authority that - when juxtaposed against the lies they had bought in the past, simply seemed to make sense and were appealing to minds that rejected what they thought was correct in the first place. Perhaps, in previous experiences, they experienced the abusive Southern Baptist Pastor, or the deviant Catholic Priest. Perhaps, in previous experiences, they remember the commercialism of secular Christmases, or the perceived emptiness they may have felt chasing Easter eggs on Easter morning. Or, perhaps, they simply were not taught the tenets of actual, authentic, Christianity - instead trapped in a televangelist-oriented, money-abusing system bent on money, authority, and power - and fled it, only to be attracted to the exact same system by someone else who told them they, well, were not after their money, and were not, initially, believing the system was about money, authority, and power. In short - they were duped once, then were duped again.
In a majority of so many of these cases was one common characteristic that was embraced. The idea that what was before was wrong - so what is now must be right.
And you have to admit, from the surface - in the worldview that it was in the 20th Century - it seemed right. It certainly did seem right! Technology - the space age - in fact, the nuclear age - made a convincing argument to Herbert's theories. The rapid rise of Armstrongism and growth led a sense of credibility to the argument. It's hard to argue when your emotions are completely overtaxed with 14,000 other people who are believing what you believe, and are of the same mindset! If they are right, and you are right - well then, it must be right, and that's that, right?
And that - right there - was the seed and the trap that made it all appealing. Here's a new and different way of living and thinking that opened up new doors to a whole new world of opportunity. But with all of the available opportunities and traditions were the acceptance of unquestioned and unchecked power from those in charge of the system they were embracing. The kicker that said "I'm in" The belief that down the road, in just a few years - is the absolute assurance that Herbert's ideas were true - including you being a part of a World Rulership where you, yourself, would be one of those in the King's Inner Circle, ruling and governing in - you guessed it - authority, luxury - and power - right back to square one.
The only thing is?
Herbert's ideas were not true. They were lies. They were built on financial greed and empirical lust. They were built on irrational concepts of racism and superiority. They were built on worldly business models, with the capstone worldly treasures that would make the top rich and powerful in their world, and the poor impoverished and shackled. The promises of a Utopian government in 3 to 5 years were false. The promises of interpretations of prophecies were also just as false. The ideas of the majority of the ministers were - you guessed it - false. In fact, Herbert's empire was just as scandalous, just as abusive, just as divisive, and just as greedy as anything you'd find in what they came from in the first place. The end result was disappointment, disillusionment, and a deep hunger for facts without the emotional and/or spiritual concepts that hurt them so much in the first place. And what was created? Dysfunction, Distrust - and in many cases, agnosticism and atheism. And in most cases? Anxiety, depression, trauma - to name just a few behavioral issues that were born from the cesspool of Armstrong's Atrocities.
Bringing it back around to the original question. What is it then, NOW, that makes Armstrongism SO appealing to those who support it - despite all of the above, or the reasons, and what not?
It can only be one thing. And it's best described summarily in just five words.
It is, what it is.
Their entire lives, full extended families, decades of memories, and a host of other entrenched webs are simply worth more than what it would be to start new. So, even though there are other more appealing options that look available despite the disgust of the deceit they plainly see, not changing anything would be, to them - a greater risk of collapsing their entire life's structure than it would be to leave the structure and build new. In other words - they fear it would all collapse on them before they get out to start new.
Thus, the appeal the remains, honestly - in totality - is for many - rooted in just ONE word.