Wait until we see more and more drivers whose only job is Uber no longer able to work. What do we say to the veterans who, after being rejected everywhere else due to a dearth of skills took out a car loan on a new $60k SUV to drive for Uber, only now to get injured? Who's going to take care of them? Won't be Uber, who will just be shoving the middle finger in their faces. And I don't think you can call this a strawman, given how aggressive Uber is with vets.
This sounds strikingly similar to the working conditions undocumented immigrants encounter in US agriculture.
It's NOT better than nothing. In a proper first world country, you'd have a real safety net for people to fall back on instead of being exploited by shitty technology companies.