If people are the common resource then customer service will be the career of the future. You may not drive the car, but you could be the voice of the fleet. There will always be a chance to make the lives of those around you better in some way and you can use this to provide for yourself.

But, that aside, why should the productive care whether you do or not? Let's say self-driving cars do put you out of business, but we acknowledge that you didn't really do anything to make yourself employable. Why do you deserve any resources, let alone a comfortable amount, for not doing anything? And deserve, shmerve, why should I be so stupid as to let you take it from me? If I work I'll simply horde a bit of food and then stop working until the UBI stops and you starve, then I'll start producing again. So why not admit this up front and treat you like an excess coyote population? Spay/neuter you, or maybe leave poisoned food(-stamps) around?

Welfare at least is intended to help people become self-actualized and productive, but UBI is designed specifically to remove all incentive to ever help anyone else. UBI is what someone would come up with after reading the CIA manual on sabotage and thinking - how do I apply this to my entire civilization?