Because getting stabbed from behind, run over by a car, attacked in public where if you do anything you will get mobbed because "You don't ever hit women", getting shot, burned etc by some psycho bitch requires you to be a pussy. Then there is gay domestic violence thrown into the mix.
This is about the most piece of shit thing I have seen you say.
And because of the attitude you just expressed most men won't report domestic violence against them even when seriously hurt, most courts won't prosecute women in any way and most families and friends do like you and brush it off. And then you can add in the fear that they might lose their kids because divorce courts and child custody laws are so sexist in the western world as to be insane. Of course, if this happens, little miss psycho bitch just tells people he hit her, they believe her no matter the circumstances and bingo, jail time, record, lost of rights and kids.
So, keep ignoring the fact that while 3/4 of all domestic violence murders are committed by men, 1/4 are committed by women along with the other nasty statistics.
So laugh it off, hope it never happens to you or someone you know.