What do you see as the upside in disabusing people of their religion ? It seems one who is so enlightened would leave the poor things their comfort. Or maybe there really is evil and it can’t help inflicting its pain on others.
There is no upside or downside. I firmly believe that far less than 1% of the world is capable of truely independent rational thought. Most people are content with internally inconsistant belief systems. Many others think that all opinion is equal. For these people, religion is absolutely necessary. They need to have someone tell them what to think and how to act or they feel lost emotionally....even if requires them to believe in invisible people, ghosts and magic.