I think the issue is not “religion” because that’s hard to define. What do you count as a religion and what not? It’s kinda not clearly defined. I.e., you can “believe” in science, yet does the belief make it a religion?

I think what’s more the issue is the fact that people cling to nonsensical statements and are unwilling to look at things the way they are. I.e. a recurring theme of religion is that it absolves people from thinking, i.e. from making their own thoughts and relating those to reality. That is the thing that must be dealt with.

In other words, people must be taught to think and analyze the world around (and inside of) them. That is what leads to wellbeing and happyness.