Dumb religious beliefs that either validate or turn around a life are nothing JW's have any monopoly on.
Therefore your question is something that applies to anyone who knows someone who is following a way of life that they think is dumb due to a set of beliefs, and gains some fringe benefits from this.
Personally speaking, people can believe we were created by the Easter Bunney if they don't parade their beliefs in front of me as though they think I am ignorant or deluded. Then they have asked for enlightenment.
My parents are in their mid seventies. On one hand I want to tell them everything I know. On the other hand it would be a little harsh; "Hey, Mum, Dad, you wasted your LIVES!!!!"
I was very conflicted about this, but eventually figured it out, for me. This is what I wrote to my dad a while back;
I'm very happy with what I believe and how I feel about things, but I'm in a difficult position.You are free to say what you like about what you believe; it won't change how I feel for you one iota, not one jot, or cause me any difficulty or conflict.
It is wonderful that my difference in lifestyle has not diminished your or Mum's love for me.
I have no desire to 'stand against' or be seen as doing that. I just believe different things, no religion or anything like that, but beliefs all the same, although they'd seem rather scientifically oriontated from your point of view.
But I am aware of the discomfort you might feel and the difficulties you might face if I discussed what I believe. Not due to you or Mum, but due to the view taken by the Society on those with opposing views. There does not seem the scope for someone to have belief and be seen as living life in parrallel with people of different beliefs. A difference in beliefs is seen by definition as opposition.
As I do not want your loyalty to the Society to conflict with our relationship as son and father, I'd rather not get into these sorts of discussions.
They've not challenged this. If they did ("well, say what you have to say, we're not going to let it get in the way of our family"), I would have 'permission' to speak freely. But they are happy with the status quo.
And I also got some nice little mindbombs in the letter;
"the view taken by the Society on those with opposing views"
"A difference in beliefs is seen by definition as opposition"
"I do not want your loyalty to the Society to conflict with our relationship as son and father".
Once my parent are gone, my brothers don't get the same consideration; I will speak. If any of my nephews show any sign of wanting to know, then I'll speak. The movement they need is on their shoulder.
Other people are 'less important' than family, which I suppose I need to comment on to answer your question.
If they live their lives and let me live mine, fine, they have every right to believe in the Easter Bunny.
If they are going to do something really stupid because of their beliefs, I'll speak.
If they are in distress bvecause of their beliefs, I'll speak.
If they knock on my door, hear me roar!
If they are happy worshipping the Easter Bunny, I'll shut the fuck-up unless they want to try and prove themselves right.
Institutionally, rather than individually, I have a more full on, 'fuck the WTBTS and the horse it rode in on' attitude, as I'm not walking over anyones deliberate dellusions, but attacking a crappy little cult.
People living in glass paradigms shouldn't throw stones...