No one here can adequately answer your questions, since they’re not really questions. You were annoyed by something and think that there is no reason for it to not be in the general settings UI. Fair enough, I kinda agree, but I’m also a power user and don’t mind tinkering in about:config, so it’s no skin off my nose. There’s nothing wrong with venting if that’s all you needed, but if it’s really rubbing you the wrong way why not file a feature request for them to change it?
Like many respondents on this decorporatized FOSS wang-dang-doodle, my answer is some variation on “Linux for desktop/laptop unless I’m forced to use the W-word” and “Whichever mobile OS makes the browser happen while I’m away from Linux, but I’m sad that it’s not Linux”.