Well, look at it like this....as a kid, I got bullied. I learned at a young age that the surest solution is to fight back in kind. Bullie calls you name, return in kind. Bullie pushes you, push him back. A bullie hits you, hit him back.
Unless that bullie was a girl. A girl can call me names, and I can fire back, and return in kind, up to physicality. We both taunt each other, up to the point the girl gets upset and slaps me, and then that's it. I have no recourse. This has happened to me, not all bullies are boys (just most of them).
So, isn't that an example of a boy not treating a girl equally?
Now, we can say that the boy should tell on the girl, that the girl should get into trouble for hitting. The problem is, as kids, it's been my exp that that is the worst thing you can do, it just makes them come after you more later.
And as adults, we what, call the cops because a girl slapped us?
I had a room mate who dated a girl who found out he was cheating on her, so came over, knocked on his door, and the moment he opened it, she slapped him on the face, hard. I heard the sound it made from my room, with my door shut. Now, we see scenes like that in movies all the time, too, don't we? Some dude is a jackass, a jerk, scumbag, and the strong fierce lady slaps him for it.
Reverse the roles, and tell me if you think we're being treated equal.