You are right that it’s just about impossible to convert theists to atheism. But that’s not what I do. I try to encourage people who are already doubters that breaking away from theistic pretense may give them something to be joyful and satisfied about and improve their lives. Arguing about theism vs atheism can be boring, but I seldom do that with theists. If you get that much of an argument from theists it isn’t worth arguing about. But if you try you can find many people who are on the fence and just need a little encouragement and to be shown the value and joy of rational thinking. I never tire of that. Sometimes atheists do preach to the choir, but that’s not all bad, either. It’s a way of communing with like-minded people, no different than theists talking to other theists about the value of their religious stance or anyone with a particular philosophy, religious or secular, talking to their co-horts about that philosophy. It’s part of being a social human.
Lois