a matter of practicality. There are only 4 on ice officials and there 10 angry dudes punching each other.
LMAO you are just saying these referees are weaklings.
Ok so why don't they deal these players a 5 or 6 figure penalty plus a ban for half a year, and their team has to play without spectators at their next home game... it needs to hurt more than one blow in the face.