My intrusive thoughts are taking away my imagination.

I'm an aspiring author who is currently writing a story about a Lovecraftian forest entity, which obviously doesn't exist in real life (hopefully at least, lol), which means that this is taking away my main passion. Recently, I don't know what caused it, but I have been having an issue where whenever I am reading a book or watching a movie with some sort of supernatural phenomena, such as demons in horror movies, I will get the intrusive thought that my brain keeps telling me "That can't really happen! In real life, that's just silly superstition! That doesn't obey the laws of physics!" Yeah, I get that, but this is a book/movie! It really sucks, because I enjoy reading and writing about the supernatural and stories that don't exactly follow the laws of physics, and mostly hate realistic stories due to how limited they are. So if this keeps up I guess all fiction is off-limits for me. And this isn't an example my tastes changing or anything, this is genuinely something that is making me stressed and sad, because my imagination is what makes me who I am, and me losing that would be like DaVinci going blind, or Gordon Ramsay losing his knowledge of swear words.

Does anyone else relate to this? If so, how have you overcome it?