The power is really two-fold:
1. You have the power to produce profits for your purveyor of Pinots. That is, if you can upsell or encourage customers to buy more and more expensive wine than they might buy otherwise, you'll be oh so appreciated by your boss; and
2. You have the power to please. Finding just that right wine that makes an evening truly memorable is a big deal. And it's likely that kind of power that you actually care about—the kind that got you into the sommelier gig in the first place.