It's a REALLY bad analogy. You can have the milk producer can graze in your backyard and all you got to do is squeeze in the right spot, chill and drink.
For oil, you gotta go halfway 'round the world, dig a hole 10,000 feet deep, pump out the crude, ship it to some godforsaken place where they'll still let you run a refinery, boil it until part of it turns to gasoline, truck it to a station where you pour it into a tank in the ground, and then pay somebody to stand around and guard it til you show up to pump some into your car and pay for it. Gasoline oughta be costin' us $50 a gallon!