As an aside, one of the most petty things I get annoyed at is how badly named and organized these things are. In all things.

Any sort of dark and somber low-fantasy game could be called a souls-like.

Heck, even the term RPG could apply to almost 80% of videogames. The history of exactly where it came from is a bit messy, but seems to have been used differentiate D&D from other tabletop games like poker or monopoly, or maybe even war games. It makes sense in that context, but I today's context it's hard to find a videogame that isn't engaging in roleplay in some form. Yet we look to things like level and stat progression as being "RPG elements" even if they have nothing to do with roleplay at all.

It's not just games. "Metal" music very rarely has anything to do with metals.

A lot of it is marketing. These labels make it easier to sell things. Having categories at all hells consumers find things they like or don't like (such as OP). I just wish things were better-organized. I like things like Steam's tag system a lot, but the tags themselves have been halhazardly cobbled together over decades of making words up and changing what they mean.