At the end of the day it's up to you, there's a hundred plus ways of getting hurt skiing, most of them you can't predict or control, but if you can't ski without clinchers or a power vest it gets even more complicated. Plenty of guys with back issues are quite happy their powervest, plenty of husky guys get a lot of benefit from the clincher style gloves, it's up to tou to weigh the risk/reward.