You're making it this big societal argument. I agree that what you are talking about makes sense. It's why we don't allow child labor, for instance.
I'm questioning whether Uber is one of those situations. I don't think you're making it clear that it is, so much as that those situations exist. Which I don't contest.
To what degree do Uber's business practices create (or at least perpetuate) those situations? To what degree are they part of a giant societal machine that creates or perpetuates those situations?
To be clear, I don't have all the answers to these questions, but they are the questions that I ask myself when issues like this come up.