I mean that's the problem right now, no? I don't know how to tag my game with the tags that someone who's been convinced to give itch a go will search for, and they don't know what tags are being used to classify games other than the genres. So they click on a genre tag if they can find it, and get a jumble of games that are trying to be Video Games, half-made experiments, punk deconstructions of what a game is, and new developers' first projects, while missing any experimental things that don't really fit into the genre tags or maybe fit more into others but provide the experience they're looking for.
And again, I'm not saying there would necessarily be a big divide between These Games and Those Games, but there would be a way to signify what the game is trying to do. It would be voluntary, there's no reason a game couldn't fall under both or neither, and there's no reason the entire site would be divided into A and B. It would just be a section, or a prominently displayed tag, that neither consumers nor developers need to guess at and negotiate with each other.
Here's an example: What if I use the tag trashgame instead of artgame? What if I'm *not* making an art game, and I want to tag it as commercial? Where can I find an explanation of what artgame means if I'm new to this? Yes, it is possible for someone to come to itch for the first time and figure all of this out. It's also far easier for them to look at the front page, turn around, and buy something on sale from their steam wishlist, and that's exactly what a lot of people do.