There are currently only 105 Master Sommeliers in North America (90 men, 15 women) and a mere 170 such wine professionals worldwide who have earned that title since 1973.
The wine store is there to impress you, not the other way around. You're not supposed to know all the different wines. They are. Great bottles exist at every price range for all occasions.
Now that the Beer Summit has resolved any lingering issues over the arrest of Henry Louis Gates, we can get back to our perfectly harmonious post-racial society. I, for one, am relieved.