Actually, as stated in the article, the other main problem is habitat creation for deer via sprawl. Deer are extremely adaptable and are perfectly happy hanging out on highway verges, fields and the like. Wolves don't like those things. Simply reintroducing predators won't work if those predators don't adapt to these new suburban ecosystems.

Coyotes do adapt but they aren't generally capable of taking down deer. But humans with guns are. As a hunter myself, shooting deer is a quick for the deer and good for the hunter in various ways, not all of which have to do with eating.