Exactly. My point exactly. I and countless other people I know went through corporal punishment, not abuse, and we turned out perfectly fine. There is a fine line between corporal punishment and abuse, but it's not hard to figure out where to draw the line. As you said, making bruises, drawing blood, breaking bones, etc., that is abuse. Slapping someone's face just hard enough to get their attention is not abuse. It'll hack 'em off, guaranteed, but that does not constitute abuse. Doing like my dad has done before, where he lost his temper at us and knocked one of us to the ground and started kicking us or grabbed one of us by the hair and slung us around--now that, I would say, qualifies as abuse simply because it is excessive and unnecessary, but it's not really physical abuse so much as it is emotional abuse. It does nothing but breed resentment when it becomes excessive like that. So that's why you, the parent, don't let it get excessive. You don't let your kid keep doing something that is wrong or that is annoying you and then let them keep doing it and keep doing it and keep doing it until it has you so annoyed, aggravated, angry, etc., that you lash out at them in anger as a way of punishing them. No, because that's when punishment has a tendency to turn into abuse--because you're angry--and therein was my dad's problem. What he should've done was to nip in the bud whatever it was that was wrong or that was annoying him and dole out the punishment, if necessary, right then. That way, he wouldn't be angry when he was dealing with the offender and the offense, and the punishment would not become excessive and the punishment would definitely fit the crime.
Pardon me, I don't normally ramble like that, putting my thoughts down as they come to me. Normally, I'm much more coherent in my writing than that. But forgive me, it is nearly 6 am.