For practicing jduds to accept WT as anything other than "the only true religion" they would first have to
think about it - critically
research it
weigh up the evidence
accept the evidence
fom an opinion of their own based on evidence
WT tells them they're not even allowed to do the first step which is to think about it and most obey.
That's why.
Sad but true, there is hope though we've all been there.