Actually, both of those things are penalties. As for hockey, you can do a minimal amount of contact, but if you wind up and take a swing at someone you are going in the penalty box, and if it's bad enough, it could be a five minute major.
Sure, penalties, but if people on the street deliberately tried to whack each other with hockey sticks or take someone’s legs out (illegal tackle) or speared someone with their head (also illegal in football), clothesline someone (flagrant foul in basketball), they wouldn’t have to sit in a box for 3-5 minutes or told they have to move back 15 yards, they would be arrested. It’s a no-no in sports; it’s a crime in real life
True, but then again if you went up and hugged a stranger without permission, that's a crime as well, but it's not a crime among loved ones relatives or friends because both parties mutually consent. So in sports where both athletes have consented to the activity, reasonable contact isn't a crime. Now, if someone does something outside the bounds that the parties consented to, hit someone on the sidelines, takes off their helmet and beat someone with it, etc. that would be a crime.