Wolves rarely, if ever, hunt the healthiest prey. Since wolves always hunt in packs, it is much easier for them to trap a weak, sick or young animal. This in turn, strengthens a herd of deer when their slowest members have been removed. The herd is then able to travel much quicker and avoid other confrontations with wolves. Sick deer also prevent spreading a disease to other deer in an area if they are hunted.
Wolves are a very shy species, just like coyotes and fox they avoid contact with humans.
However, wolves are wild animals. When wild animals no longer fear humans it is more common for humans to get hurt by them. This can lead to starvation and even sickness for the animal. It is just best to appreciate wildlife from a distance.