Yeah some people seem to have this expectation that there should just magically be a button to unbreak the PC. They talk about their personal pain points when using Linux as if there’s a conspiracy of devs to hide the unbreak buttons for the sake of elitism, but that… just isn’t a thing? If it was that easy to fix an issue, you probably wouldn’t need to fix it because the system would already come unbroken by default. I sympathize with everyone’s Bluetooth configuration woes but mostly it’s a pain in the ass because Bluetooth, in general, is a pain in the ass, not because of elitist devs (who I should mention are doing this in their free time for no pay. There’s almost no money in desktop Linux, unlike in servers).

kwriteconfig6 is barely documented because you’re not really supposed to use it. All of the settings that users are expected to change are in the nice settings app that Plasma ships with. Using kwriteconfig (or equivalently a dconf editor on GNOME) is like editing the registry on Windows; you are implicitly opting into more power, out of most guardrails and into potential breakage. The UX being a bit questionable (though honestly it’s really not as bad as you’re saying, it does exactly what it sounds like it will do?) is to a degree intentional, because you’re not supposed to be using this unless you know what you are doing.