What people underestimate about nurses is the extent to which THEY are actually the ones who are most aware of and best able to diagnosis the patients, despite all the fancy machines and tests. It's hard to beat old fashioned observation and awareness and TLC, which is what nurses provide. I would take the average nurse over the average doctor ANY DAY.
Uncalled for sexist question here, but why is it that (in my experience) the vast majority of nurses are way over weight?
Give it a try next time you have surgery.