Before going into that, I would first mention humans actually kill animals(like Hens, Cows etc) to get food for them. Humans do kill sheep to get food for them, when they could get it from somewhere else. Humans use cows' and goats' skin for so many daily life products. So, getting wool from sheep won't be a big issue If proper care of sheep is taken(which undoubtedly, is taken care of). It is just that, measures should be taken to save sheep from any harmful effects and sheep do get advantage in shape of more care.
