The first, glaring reason is because Uber refuses to treat them as employees, and instead force them to work as contractors/freelancers, even though they clearly are employees by any reasonable measure.
Most of the Uber drivers I've spoken to, don't like how Uber is treating them. But, I'm not gonna pretend I've spoken to all of them, and I haven't spoken to any of them in the US (mostly South America, Asia and Europe).
But since you apparently sit on a trove of data (as you're so sure of this) that I don't have access to, could you share a bit the results and your methodology?
