It's more like I will sell the apples and oranges of all the farms except for that one farmer who dared to try to open up an apple store. At some point, if you are the only apple and orange store in the area, the government may decide you are abusing your power as the biggest such store and are acting anti-competitively
Sure, if your store mainly sells your apples do whatever you want. But once you open everyone else to sell their apples at your store for a cut, and everyone starts to rely on it as the only apple marketplace, screwing over the apple farmer next door who tried to open his own apple store is questionable
