Wouldn't self-driving cars available to all mean they're out of luck and lost the the advantage they were hoping to exclusively obtain?

It would be easy for locally owned competitors / taxi companies to be competitive with the added bonus of tayloring the service to suit the clients.

Why would you assume Uber would have exclusive rights to use people's vehicles, IMO it will just start price wars to the bottom right ?

Why would stop others from building booking software and leasing it ?

How do you ensure the third party vehicles are clean and up to standard etc?

Sorry, but I don't see it.