If we rely on NATO, it’s going to be another UN/Iraq scenario. In other words, at the request of non-combatants, we’ll wait until the enemy has gotten strong enough to cost us (that is, the US) billions of dollars to uproot. NATO and the UN are about on the same level nowadays.
In general I'd agree, though NATO might have some diplomatic utility in a situation like this one. This is their home turf, not ours.