At least it is another work option. Flexible enough for students and people with a day job that want to supplement their main income.
That's the reality we live in. Some people have multiple jobs, some people have no benefits, some people work on a 100% commission basis and in slow months they need to continue to function. "Uber-style" jobs can help you work in a more flexible schedule.
But to be honest, I do not think that being an Uber driver full-time is a very good option. Then, I do not see Uber at the moment being at the same evil scale than Walmart, for instance... a company that has a anti-union training, anti-union team and standard operating procedures, and makes billions of dollars in revenue while having their entire workforce on welfare.