Everyone is allowed to choose when they are older, even in a destructive cult like the JWs, many leave when they become adults. Even with massive proselytizing, the dubs have a very low growth rate, I believe eventually they will go into the negative, as their particular brand of religion does not work.
Making it illegal to teach religion is not going to happen, at least not in the US. So that's a non starter, too many people believe in God, and since the constitution guarantees religious freedom, you will never be able to do that. I don't even think that should be the goal.
If you look a religion as a whole, it has already changed, as society changed. It is an institution, and institutions do not change over night. Slavery was once acceptable in society and in religion, but no more. I believe it will continue to change. A person from 200 years ago would not recognize todays religions. The Amish religion refused to change, and they still exist, but on a very limited level, they will never be relevant. I think the JWs will be the same.
I think most people need some kind of religion. There are parts of the bible that I believe still works, l like the fruitages of the spirit; love, joy, peace, long suffering, kindness, goodness, faith, mildness, self control. These are things that cannot really be taught in schools. If a church focused on that, and not the ridiculous rules and dogma, then they can be relevant. That is what I think has to happen. The schools need to teach reality, and the church needs to teach spirituality, not outdated rules that do not work in today's society.
Maybe someday we can do away with religion all together, but we are not there yet. It's like ripping away a security blanket, and giving people nothing to replace it with. Atheism may be reality, but it cannot keep you warm at night, for now, for most people.
