While I agree UI consistency is dead even on MacOS now, personally I believe the Windows issue stems from them being too scared to actually push out full redesigns.
Look how vocal and angry people were when they started redesigning Settings even though most of control panel was designed for sub 800x600 resolutions.
This is why we're stuck with such inconsistency because they can never make sweeping changes without people freaking out, this is why we're stuck with things like that terrible device manager that refreshes the whole view and flickers 3 times when you plug in a USB device.
Really Windows should be pushing out a complete redesign and update of at least 2 of these apps every version. People will scream and shout every time they do but it's the only chance Windows has to completely modernize itself and get it up to par with Mac system tools and standard apps.