And we don't have a choice but to live with people.

Selling a random person an item and asking them to give over control to said item, when the item carries the very real possibility of causing harm, is a harder sales pitch. You have to remember that not everyone is sold on technology, just for the sake of technology.

So you need to pitch the safety. Because you're selling an item that carries much, much less possibility of causing harm than the human-driven car does, and also that allows you to reclaim your time spent commuting (in a self-driving car you could easily e.g. read a book, code or talk to people).