A lot of people still required it for spiritual reasons. Atheism is not for everyone and some still need directions from a superior force in order to put their values/lives in order.
I’m find that behaviour naive and kind of foolish, but as long as they are respectful with others and don’t try to convert everyone else I don’t see a problem.
That’s said, Christians are way less indoctrinated and usually are freely to choose, at least in my experience ( western europe ). If that’s possible is thanks to the historically separation of church and state, which is something the other 2 big religions dosnt seem to like.