I use middle-click-paste all the time, and I would miss it. As you say, this is not a life-or-death thing. We just gotta have our drama.
I use Plasma, so, A) This conversation doesn’t apply to me, B) There certainly would be (or maybe already is) an option to turn it on/off.
As an aside, I flip off my work laptop frequently. It’s Windows 11, and it’s hateful.