I get what you're saying, but I think the idea behind it is taking away excuses. People use religion as an excuse to do shitty things, and get away with it because followers agree with the religious reason. But take away that structure, and now you have one less tool in the toolbox to indoctrinate with, leading to an overall lower retention rate. People will still be shitty, but I think it will be harder to justify to the general public and, as a result, less tolerated overall.