They said that about personal computers too and yet here we are..
It seems alot of people have forgotten the growing pains that on early personal computers with their buggy, easy to hack software, blue screens of death, etc., we had to endure early on while they were sold to the public as the latest and greatest thing,
people won't put up with any of that in a fully autonomous car where a bug, hack or software glitch could be a life or death experience as opposed to a reboot or reinstall on a personal computer.