Those of us who's parents became JW's back in the 60's or before, had no idea of the changes that had occurred in the religion before their time, back in 1930's and 40's. They knew nothing of the failed prophecies, miracle wheat or Bethsarim for example. We, their children, were indoctrinated before we knew anything about these things either. We were too young to do anything other than go along with what our parents told us to do. 1975 came and went but we were in it up to our ears before we started seeing the flaws in what we were taught. That's how the religion has grown and taken on a life of it's own over the decades. There's been a long history where a revolving door of people have been coming and going, each group having no knowledge of the other.
It's the same today but the difference is, the younger generation have been taught a dumbed down version of what it is to be a good JW. We didn't really know about the history of the religion but at least we could defend it's current beliefs. The young ones now have neither knowledge of the JW history or the skills that it once took to be a considered an good JW. Because of this, it wouldn't take much to knock them off the JW treadmill. That's where the internet comes in but the thing is, these days, you can be a "good JW" with very little effort or understanding of the bible or even the ability to teach or defend your beliefs. There's a feeble premise of wanting to save others but first and foremost, today's JW wants something to assuage their inner sense of mortality, even if doesn't make sense. In fact, the less they look into things the easier it is to maintain the notion that they have the truth. They enjoy the virtuous "I'm saved" feeling that can now be had by simply handing out a few tracts or reciting a few pat phrases. Those who are able, leave or have already left the organization. The others are choosing to ignore the evidence out there that is readily accessible. It's much easier to be comfortable and feel safe by not doing much, than it is to leave and have to face reality that you've been raised in a Cult.