Uber's defense fails The Duck Test. They are describing a job, people doing a job, people paying for a job, and people taking a cut of the profits. They just don't use those words. I suspect if/when this gets to a higher court, the whole thing will come crashing down, because to allow Uber's weaselly redefinition of common terms, would be to allow other classes of employment to similarly become unprotected.
Isn't being a driver on Uber platform same as being a seller on Amazon marketplace? Amazon takes care of delivery, cancellation etc and charges a commission for those services.
A coordinated Amazon/Uber/Lyft shut down in California would be something to behold.