But how are Uber and Lyft specifically exploitative in ways that e.g. WalMart, McDonalds, Starbucks, local landscaping companies, etc. aren't? Those jobs all pay roughly similar wages.
There's an entire political movement eager to campaign on that has been gaining energy the last few years because people are losing faith in the current system.
I would also wager that the vast majority of ordinary taxi drivers are self-employed and working for some agency, an arrangement not too dissimilar to that of Uber/Lyft.