I don't see every human abstraction as having a hypothetical reality to it. There isn't a hypothetical "if Ronald McDonald were real". Belief in deities is really about the state of mind in the believer, and I don't have a notion of a hypothetical reality to that either.

For example praying is about things like trying to bargain with the universe, and then a confirmation bias in seeing your prayers answered, or group prayer as a social behavior, and probably a large part is simply a matter of folks being conditioned to pray. None of that creates some hypothetical of the thing you are praying to. It's all about what's going on in your head.