This discussion is only orthogonal to the point about nobody being forced to work for Uber/Lyft/whatever else. Nobody is contending that people are being forced - therefore the discussion focuses around other questions, i.e. the core tenets of liberal egalitarianism, the nature of consent (also a metaphysical question), domination and subsumption under capital.

For example, this book review was posted on HN a few weeks ago: https://ndpr.nd.edu/news/private-government-how-employers-ru...