Gretch, since you keep singling me out on this - you need to take a deep breath and relax. My post wasn't a comment on your skiing, you asked a question and I answered it. It wasn't meant to criticize you in any way.
As for having never seen anyone carving turns in steep, tight terrain: I don't what to say without offending you, but lots of people can and do. Maybe not pure textbook carves in tight trees - you need to skid a bit once in while, but certainly not jump turns in any way, shape or form. Yes, it's a good skill to have in your bag of tricks, but unless you're skiing on 200cm+ skis it shouldn't be neccessary to perform enough jump turns in a row to tire yourself out from them.
It does have quite a bit to do with equipment, jump turns were essential in the steeps back in the days of 208 straight skis - hence the "old school" comment. With modern equipment, it's all about being on the right skis for what you're trying to do. I don't head out to ski tight, steep trees on my 188s, I drop to 177s for that. Conversely, the 193s come out for big lines with long run outs.
Hope that cleared things up.