The fact that he molested the children means the parents trusted him enough to give him the opportunity to do it.
I’m saying that was a mistake - don’t you think it was a mistake?
No, it doesn’t mean that at all. It doesn’t mean they knew him, investigated him, or even knew he was in the room. It doesn’t mean that all male nurses are sexual predators. It doesn’t mean that you should avoid getting to know about the men and women who spend time alone with your children, and just arbitrarily eliminate the men. It doesn’t mean that you should deprive your children of medical attention unless and until all men have been forced out of the medical profession.
You need to learn about cause and effect, if it’s not too late for you. And it would probably be a good idea to see a therapist about your fixation.