I have no problems with hunting as long as it's done responsibly. As for reasons, there are a few. First of all, hunting can be a lot cheaper in the long run. Also, and I can personally attest to this, fresh killed meat tastes a lot better than the artificially messed with stuff at the supermarket.
And there's always the aspect of sport, which personally I don't see a problem with, but some people are for whatever reason offended by. As long as the hunters follow the regulations, there's really no reason to complain.