If there is a hot new game that I am interested in, Game Pass might be appealing because it allows me play a new game for cheaper. But I also don't play games very quickly, because I'm busy.

Steam allows us to avoid FOMO. I'll wishlist it, meanwhile I'll play my massive backlog. By the time I complete one single player game, the wishlisted game is already on sale and the game has matured with updates. It's perfect for the adult gamer.