Sparrowdown - for a never-in like me, it was really hard to understand how my relative (a convert many years ago) could ever have been taken in by the WT gibberish. My relative now has born-in children (teenagers) and I was furious when I was told that these bright outgoing youngsters will not be going to college because of the 'worldly dangers'.
However I've come to the conclusion that, like Clarity says, many Witnesses just don't care about problems with, and changes to, doctrine. They can't countenance the idea that they (and for born-ins, their parents) have been wrong for so long and that they have potentially wasted so much time on falsehoods.
It seems to me that sites like this do a great job in encouraging those with doubts to leave and supporting those who do. I also hope that it deters some from joining the WT. However it can't do much about the great many Witnesses who are happy to carry on regardless.
Best wishes.
Bemused