The point is that Apple and Google have used their market power in other verticals (hardware, services) to lock all other competitors out of the mobile app distribution market. They are acting as private regulators of who can publish a mobile app, which is unacceptable if we still claim to support competitive, public markets.

How would a consumer even know if they were happy given the lack of options? Are they actually happy, or do they just have bigger issues to worry about? That's why we hire experts to act as regulators for new industries.