This is like being a restaurant and only having one source of produce/spices/meat. Could I start my own cattle farm, raise my own chickens, plants my own vegetables, and mill my own spices? Sure... Is it a reasonable assumption that a restaurant should do this and as such that one supplier should charge whatever they want and sell to whomever they want? No.
This is more like being gas station and getting franchise from one of very few big oil producers. Independence? What independence? You earn only as much as you allowed to earn.
Well, nothing prevents you from moving to drilling and refinery business - leaving said gas station as a hobby
