I've been intentionally writing KCM control modules for various traditional command line functionality recently, with the intent to get them in some early series 5 KDE release. Just proof of concepts, but so far I've gotten working ones for xrandr, wlrandr, and saned (ie, network scanners). They aren't usually very complicated, just a bunch of widgets. I intend to finish them with a qml rewrite, most of the work was before you could embed qml in widgets.

The point is, yeah, you shouldn't have to go to a terminal, but that requires the development of guis to overlay the complexity. I use my relatives as test beds for whatever breaks that requires a "control panel entry" to fix.