There is some chivalry, that's true, and honorable, but there are certain things a cop should not do. They are held to a higher standard, and when they live up to that, it works better for us and them. I dont want to see a cop punch a guy either, they are supposed to be above street fighting. If the officer is losing the battle however, all bets are off. I don't expect to see a cop twisting a persons limbs, permanent ligament and joint damage should not be part of restraint. I do not expect a cop to choke any individual under any circumstances, you just dont take someone by the throat/ I dont want a cop to spit on people, and I do not expect to see a cop kick someone in the balls. Likewise I do not want to see a cop punch a woman in the face.
If you or I can lose our 2A rights for throwing food at a partner during a fight, (domestic), then a cop shouldn't be punching a woman.