Oh yes, that justifies the punching!
No, it doesn’t.
She was on the ground, you compelling someone to roll over.
And that is not done by punching them into submission.
Why do you think cops grab your thumb to pull your hand behind you to cuff you?
Who are you the God of Cops? "Punching is a taught tactic", right? Why else would a cop be punching if not to obtain submission? It's allowed! It's taught! Wake up and smell the coffee!