He's being a douche saying they have so much powder in Utah he doesn't even NEED metal edges... I wouldn't skip tuning for the year. If you're riding ice or hardpack you'll want to keep your edges in good shape. If you're not comfortable tuning them yourself, at least get a basic tune every 5-10 days on the hill or so. You'll know what I mean when you get the first edge tune one day!
And I agree with the advice above. It just really doesnt matter with the location i live in. When i was riding in Europe I tuned them regularly