Different rules for different genders are ridiculous. It's not like men and women would be playing on the ice at the same time and the women would get crushed into the boards.
Taking checking out of hockey is the same as taking a three point shot out of women's basketball because girls aren't supposed to be able to shoot the ball that far, or making a soccer field smaller for women because they aren't supposed to be able to run that fast and that far, without even giving them the chance to prove otherwise.
I guess I don't buy the women's boxing argument at all. That's comparing apples to oranges. Are you saying that we only want to add checking to the women's game so we can see the gloves drop, which wouldn't be appealing because women's boxing is a flop? Regardless, I can't see the appeal of two hulked up women duking it out in the ring anyway......ok, I'm not a boxing fan period.