I think I wanted to be a doctor when I was younger, because they save people. But that all stopped once I realized I don't like blood. I'm fine getting my blood taken, seeing blood in movies and whatnot, but cutting another human and seeing the blood ooze out is a bit much.
Oh yeah, it's not the nicest job.
I field dress animals after I shoot them sometimes and I'm good at it, but I don't enjoy it so can understand people not liking the thought of cutting up people.