Being a nurse or care technician in a hospital is more dangerous than being a cop in terms of being physically assaulted. They are often females on 1-to-1 assignment with mentally ill men that often attempt to attack & rape them.
I'm not sure if you just intended to reply to someone else, or just ignored the words I wrote completely. Comparing these professions on a global basis is dumb. Nurses who work in environments where they are exposed to convicts or the mentally ill are at a higher risk of assault than those who work in pediactrics. Comparing risk-laden professions by just putting everyone into a gigantic bucket by a job title in order to say "which job is more dangerous" defies a basic understanding of what people in these fields actually experience depending on where their job is, their position, and their role (disclosure: son of a firefighter, brother in law of a cop, husband to a physician)
The point is, you can render specifity to the point of uselessness. Of course there are specific situations & circumstances where a given occupation is more risk prone than another, but global averages are where public perception & policy are set & laws are made. Such is life.