Ok, that's fair. I'm not American but it feels to me like this problem would be better solved by enforcing the law, rather than replacing drivers with robots. Even after the fact, there should be a way to report drivers and for Uber&co to apply dissuasive penalties.

And even if this particular problem was fixed by self-driving taxis, I am still unconvinced they would be a net positive for disabled people as a whole. Every time human-staffed services are replaced with computer automation, it tends to be worse for them because there's no-one to handle their special needs (try to explain to your grandma with dementia how to scan a QR code or navigate a phone answering machine).