You really think that the mark-up that distributors add to the final cost of beer is pure profit? That they don't have the typical business overhead costs (fuel, trucks, labor, warehousing, etc) and that those cost would then have to be borne by the self-distributing brewery? And, in most cases, the self-distributing brewery would not be as efficient as a multi-brand wholesaler so it might cost them MORE to distribute the beer? Lots of states allow breweries to self-distribute and beer is not appreciably cheaper in those states, or from those S/D breweries. And many breweries in those states still choose to go with an outside distribution deal outside their immediate region of the state and/or once their barrelage reaches a certain size.