Those are real problems, but they seem to be orthogonal to the issue of whether or not Uber drivers should receive employee protection.
I don't think the same standard of employee protection applies to something like being a driver. I don't think you could apply the heavy hand of regulation without fucking over more people than you think. The moment you get the modern state on in, you get professional rentiers sniffing out any holes they can put roots in.
This isn't children being abused by clothing factories. These are an entirely new class of people and provider who are enabled by the fact that the regulatory appartus doesn't choke them before they even make their first step.