The players know most high contact is incidental, accidental & unavoidable.
The dumb thing is some of the worst knockouts you see are guys going low as tacklers and collecting a knee or hip so policing mediocre high contacts out of the game doesn't even fix the issue.
I do think what Kaufusi did was 100% intentional and he has a track record of forearms but will be interesting to see if he can beat it at judiciary.
It's basically just his word that it was an accident vs them deciding either it was intentional, or at least an avoidable accident.