I think the argument is rather to make Windows simpler (because it’s supposedly too complicated for many non-geeky users), but to retain an “expert mode” for the more “advanced” functions, or a slider as described.
Microsoft partially does that since at least Windows 10 by dumbing down and enshittening the Home Edition, while providing "expert settings" like the Group Policy Editor or better Windows Update settings in the Pro Edition and above. The strategy hasn't really proven popular so far