I'm doing my plastics rotation now and after 5 months of general surgery.... Plastics is GLORIOUS!!! The guys come in at 7-9am, do 1-3 cases, then go home on their hospital days. Then they have cosmetic cases at their office on other days. They are almost always done by 3pm, there aren't very many times they have to deal with catastrophic complications, they don't take call from the ER, and they get paid WELL! No one is going to force him to be a ridiculously busy plastic surgeon making $1million plus. He could have a reasonable schedule and still be compensated very well once he gets out into practice. If I was going for a fellowship after a General Surgery residency I would choose plastics hands down.
Guess what? ALL interns are miserable with the hours and lifestyle... Derm residency might be a bit easier but its no joke, and has been pointed out, there is a very good chance he wouldn't ever match. So he'd better think long and hard before ditching an integrated plastics gig (the MOST competitive residency to get) as he won't ever get it back. That program director will have NO PROBLEM filling his open spot.
He seriously needs to consider if being unemployed is better than being a plastic surgeon. Maybe it is? Maybe he hates surgery so much he just can't see himself doing it the rest of his life. Despite all the idealistic crap medical professionals spew... at the end of the day it is a JOB. And once he's done he can have what many consider to be a pretty good one. If he just can't handle it then maybe he should switch, but likely won't waltz right into a Derm position (and may never!), and very realistically might have to settle for something less competitive. If he's not okay with that... he'd better keep that spot.