Hey I'm not a guy, but I work Emergency where we nurses are 65% guys. None of them have EVER complained to me that they feel disrespected. I also socialize with a pretty diverse group- including male nurses, none of them have trouble explaining their job.
Nursing is not a bad job for men in the medical field. As a matter of fact, I can't really think what would be a bad job in the medical field for anyone- except maybe Janitor.