The baker has no decisive market share, people can reasonably go to another bake and get the exact same cake for the same cost (or even lower cost). People can

The baker has no decisive market share, people can reasonably go to another bake and get the exact same cake for the same cost (or even lower cost). People can't reasonably go to another video hosting platform and expect to get the same kind of exposure and income. Some people's income purely depends on youtube's quasi-monopoly on video hosting. A more correct analogy would be if a baking company had 90% of the market and refused to make cakes for gay weddings and every other baker can't afford the volume prices so the cake will be more expensive and possibly of less quality.