I think that’s a pretty broad brush. Plenty of players finish their checks without getting “caved.” Although that’s a fairly imprecise term, “caved”, so I can’t be sure what exactly you are saying. I’m not defending Glass here I’m saying a Will Cuylle, for instance, does a good job finishing his checks and wearing on the opposition. Rarely takes himself out of position and can almost always get back into the play before his check-ee. But sometimes even a check that does take you out of position can be a net positive depending on the target and situation. Again specially if the person you are hitting takes longer to recover and get back to the play than you do. I mean don’t most coaches implore their players to finish their checks?