That's a great theory, but the reality is that only a few police will take that seriously. Keep in mind that the job of police officer is not something that is highly desired. Police departments take what they can get. Sure some are great, but many are not very sensitive or intelligent.
If someone is abused, they need to get out and stay out of the relationship. Quit calling the police to be dispute counselors. Sure, if the very first time that a woman abuses a guy she sends him to the hospital, then report it to the cops; however, if it's been on-going slaps, kicks, etc.. the dude should just get his arse out of the relationship the first time it happens.
I saw a stat once but I can't recall the numbers. It was about the number of times that police are called for DV relative to how often it is considered a serious DV situation. I think it was about 100 to 1. Some people will call the police every time they have an argument, especially when alcohol is involved.