I assume my BIL is licensed as he had substantial training for the position. He retired from the police force after 20 years and worked security at the hospital for awhile, which was boring beyond belief. Someone advised him he could earn more as a surgical assistant with training. After the police work, the sight of blood didn’t bother him so he pursued that career.
Surgery, most people are surprised to find out, is not all that bloody. Usual blood loss is less than a nasty skinned knee. Dont get me wrong, there are some blood baths, but in general it is pretty dry.