That's marketing for you. There's been enough scandals in the past two years for it to be clear this is an evil company, but not many people know about this. For most, Uber is this cool new disruptive startup with awesome app and cheaper service, an underdog fighting the Evil Taxi Lords.
The profit motive inevitably leads to a company prioritising dollars over people (whether that is a consumer/supplier/employee/etc). Lets also agree that prioritisation is generally considered "Evil".
The car requirement was a bit evil? 2008 foor door at one point, until they decided to lure Lyft drivers? 'Don't have the right car(on a ever changing list); 'we'll get you a good deal on a new Prius!' ( I know a guy who ruined his credit, and lost a huge down payment because he couldn't make what Uber said he would make with that new Prius. Yes--he was busy on Friday nights driving drunks from bar to bar, but their was not enough work to keep that Prius.)
The best job opportunity for them is the best job opportunity for them. I wouldn't blame Uber for the fact that their driver jobs might not be some idealized version of the best possible job. For many of the drivers, it presumably is the best possible job they can get. I'd blame every other company who couldn't do better, not the one company who seems to be giving the best opportunity.