While this is absolutely true, I'm not sure it's a reasonable argument for defunding the police today. You wouldn't defund the fire department today, because in ten years buildings will average a better standard. The social issues need to be dealt with first, which could take some years.

On the other hand, that the police have become what appears to be a poorly trained, violent militia is indeed a problem that should be dealt with today. Perhaps by defunding. I don't know...