Earlier quoted context omitted.
They have a choice between two monopolistic platforms, frankly. Your purchasing decisions are not mutually exclusive with action from courts and legislators and voters and such. And, especially if you take into account that market theory as well as game theory tends to view individuals as rational agents pursuing self interest (1), a pure free market approach simply does not effectively curtail monopolistic and other…
As a user, I can freely sideload onto Android devices, or even use custom Google-free distributions. This argument is incomplete.
Luckily courts take into accounts the barriers inherent in such things. If few enough people do such things because the difficulty of doing so makes them impractical for most people, they give appropriately low weight to such arguments.