Really? I heard that Pavoratti eats pasta before he sings.
I can't stand opera singing to be honest. The closest to it that I can stand is maybe Tarja Turunen from Nightwish.
I was watching this show a month ago hosted by Sir Tony Robinson on the History network talking about the worst jobs ever in history. One of them in the victorian ages (I think it was then) was being a male opera alto singer or something like that. They had one recording of it, and man was it ever annoying (because it's not part of our era of music). Apparently to get the job, they had to at a young age have a circumcision, and everyday for 10 years practice, practice, practice, and they didn't live long compared to the average man I believe.
For the bagpipes, get earplugs. A few pipers I know don't use them, they've been playing for 15+ years, and they seem to not have a problem, but still, when you have an instrument that was heard on a battlefield with 1000s of guns going off, I'm sure it'll do wonders to your ears.
I haven't heard the bagpipes as being stressful or harmful to any other body part or anything like that. Half the pipers I know at highland games do a practise run, then do the opening act (2 songs), then get drunk, then do the closing act. Maybe it's the booze that helps. Good ol' Grandpas cough medicine.
Not sure if this is true, but I heard that the majority of the bagpipe players in world war 2 (maybe even ww1 too, I forget), were shot in the back. So careful bluespresence! Keep your enemies close but your friends even closer
-Jamie