...oh! Right. Another reason, forgot to mention this one earlier because I was still kind of waking up at the time: Web builds put themselves at the very top of itch pages. So like, it tends to be the first thing people look at on an itch page when one is there. Which I really don't want when the build in question is intended as a last resort fallback instead of the intended version of the game. I'd rather somebody try to download it, run it, and if they have issues, then use the web build.
...I suppose I could add a disclaimer into the web build itself...? I do have a few minutes right now... I'll see what I can do.