WHY DO ONLY A FEW START TO QUESTION DOCTRINE CHANGES AND NOT EVERYONE?
That's great A watcher, so what are you going to do if you or one of your kids needs a blood transfusion? Just go along to get along and die or kill your kid. Yes Jehovah does love suicide and murder, he also loves human sacrifice. Wait maybe not and if I kill myself by not taking blood I'll be comiting two major sins as well as Jesus said 'we desire mercy not sacrifice'. Paul said eat whatever you want. So it's not so easy is it and are you really in it for Jehovah and Jesus?
disillusioned2 - "Why do only a few start to question doctrine changes and not everyone?"
Statistically, people rarely leave religions due to doctrinal issues. Usually, it's for much more personal reasons.
a watcher - "I'm not in it for the doctrine. I'm in it for Jehovah, Jesus, and my friends in the congregations."
Don't be surprised it that fealty ends up being rather one-sided.