Load a un-mixed track into 6 and mix it there, it’ll be pretty obvious, and quite quickly too, that having real buttons is faster, try it!
Hovering takes up a bit of time yes?.. say .1 or .2sec each time, sometimes longer, ok, so now do that say hundreds of times a day, the wasted time soon builds up, and that’s apart from the fact it’s fiddly when the mixer is busy with hundreds of tracks and you constantly hit the wrong thing, as i said before, even Steinberg in their own tuturial videos are hitting the wrong thing in the mixer at times!