There seem to be a hierarchy of genres.

Serious stories happening in a real historical setting are on top. And it goes down as we deviate from this archetype. Fantasy and sci-fi are a step lower, and comedy is rock bottom. Horror is often not serious or realistic, it is meant to entertain, in its own way, so it is right down there with comedy.

Of course, that hierarchy is purely artificial. People enjoy "low tier" movies a lot, and a lot of talent goes into them (to varying degrees of course). But for some reason, you don't want to say it publicly.

I think it dates back to ancient Greece or maybe even earlier. So that's a thing we have to live with I think.