Eh, fun isn't the only thing people want from entertainment but even if that were always true there isn't any reason niche games shouldn't exist. Who am I to tell someone what kind of game they should play. Lots of games out there that I won't play because I know it's not for me - sometimes that sucks cause I like the art or the concept and wish the mechanics were what I want but they aren't and I move on.
Catering to "most" also results in games that tend to be homogeneous in some way and that sucks for those that want niche. Also sucks when niche exists and gets ruined to appeal to "most" but that's just how it goes.

Deep breaths, it's gonna be OK. You are saying that all games should include a toggle/slider. I don't agree. Devs should make games they want to make and I'll play them if they appeal to me and you should too. But don't get bent when they don't have a feature you want.