I don't get the self-driving car move for Uber, et al. Instead of letting drivers use their own cars or making money on loans they will all of a sudden have to

I don't get the self-driving car move for Uber, et al. Instead of letting drivers use their own cars or making money on loans they will all of a sudden have to buy tens of thousands of cars, maintain them and replace them every 5ish years (unless they get yet another exemption from taxi regulation commissions).