theres no more wrong with hitting a woman than hitting a man.
as in, really no one should hit you, and you should hit no one. i've never, and will never start a physical fight, its just beyond me why anyone thinks its ok to do that.
but if a man whose a bad fighter and or much weaker than me throws a punch, i won't hit him, i'm restrain him. likewise, if a man whose far stronger and good at fighting throws a punch at me, first option is to leave the situation, back off, keep them away, if there is no choice then self defence is fine.
in the same way, if a woman who is strong, can't be restrained easily and can physically hurt me attacks me and i can't move away from her, she'll get a smack, i'm not the one who started it and i'm not going to get hurt myself because of some ridiculous morality some rich white people decided to install on a population centries ago, while at the same time they spat on the poor and enslaved entire races of people, because yes, those idiots are the ones who came up with all of these "rules" people try to follow today still.
they also came up with the women at home doing nothing thing, and the can't work, can't fight, can't do anything idea's.
there is no be all and end all rule here. theres a common misconception that women are inherently weaker and less able than men, and its bull. in general woman don't tend to put on as much muscle as men, but that doesn't matter, we get hurt fairly easily with pretty frail bodies.
i mean, throw a 1kg rock at someone fast and it can hurt, throw a 10kg rock and it will hurt more, that doesn't mean the 1kg rock suddenly can't hurt you.
in any situation, i'm only looking to stop the fight, not "win" it, i'm not going to use every ounce of force i can muster in a punch unless someones holding a knife/bottle or whatever.
as soon as you raise your firsts, be you a man or woman, you are already in the wrong, morally, and legally, and to claim that at that point its completely wrong for a man to hit you to stop you, you're a pillock.