that's not really true. He bloodied up quite a few guys back in the day. There weren't really any enforcers that would shy away from any other enforcer. Domi wouldn't shy away from anyone, and absolutely could hold his own.
He started to score some goals and thought he could actually play hockey. And wasn't smart enough to realize he's nothing more than an idiot goon.
None of this changes the fact that Domi's greatest skill as a pugilist - by far - was his ability to absorb punches. In almost all of his fights he took significantly more punches than he gave. There were several fighters who's careers overlapped with Domi's who were much, much, much scarier fighters and who could really hurt people.
Domi seems to be celebrated because he was an undersized guy that hung in their with the big boys, but it no way shape or form was he the best fighter in the league and he was probably one of the few "heavy weights" that all kinds of non enforcers had no issue whatsoever fighting because he wasn't scary.
Domi "won" a lot of fights by wrestling an exhausted combatant to the ground after the guy tired himself out filling in Domi with a flurry of punches. This is not exactly the kind of thing that gives your bench a big lift nor does it make anyone think twice about taking any liberties with your star players.