Wolves are an intregal part of nature.

photo from this spring.
You are right. They are an intregal part of the balance of nature. Without them the ungulates might over populate and over graze their winter grounds. But Wolves do have a high reproduction rate and can also over populate and they can have very detremental affects on the ungulates, causing large fluxuations in both predator and prey populations. Nature left alone is never a prefect balance... it's more like a pendulam with highs and lows.
The larger predators and game animal populations fluxuate much the same as rabbits, voles and lemmings. Rising to non-sustainable numbers and then crashing. So as man "The Super Predator" we must harvest equally amoung species or these fluxuations can accually wipe out some local species. For example we found a small creek on our trapline with 4 Beaver Colonies in 1/2 km. There are no poplars left, only a few small overgrazed willows. They are forced to go long distances from the creek to forage. Left unchecked in a year or two....these colonies will all winter kill. It doesn't matter if the predator is a wolf, a lynx , an otter or man.
There used to be Mountain Sheep within 15 Km of us. They were not huntable because of the access. The quideoutfitter for this area used to keep a count of them from his small plane. This was in the 70's 80's and early 90's .....first there was 9 ...then 7....then 3 and the last time he saw them there was only one left. .... now there are none left.....probably due to predators (wolves, Bears) combined with unusually high amounts of snow. This is how mother nature really works.
Wolves and Bears have the capability to move on.... to greener pastures when a prey or species crashes. Sheep, Goats and Cariboo and Moose (to a degree) do not have that option. So a reasonable amount of trapping and hunting of these large predators makes common sense to me.