The entire process of fielding calls is terrible. You never know what's waiting for you when you pick up the phone. Could be someone with a terrible attitude that wants to take it out on you. I had coworkers who got PTSD, and a ringing phone would trigger it.
I would rather talk to a rational robot on the phone than a possibly irate human who, frankly, only wants something transactional from you and treats you like a robot.
First because it will fail a lot, as robot won't understand specifics such as what items on the menu do you want, oh but it's missing, do you want this instead.
And then you will multiply commercial calls, and spam mails will arrive on the phone.
Then people will abuse it to harass, annoy, attack competition, etc. Spam a restaurant with robot phone calls for a month and it's done.
Plus google will analyse all this data, because it doesn't know enough about you.
It's a nigthmare.
But it will be excellent for anybody with social skills. What i learn living in africa is that we became handicaped because we can avoid talking to other humans so much. Going back to france, my social, sexual and work life improved a lot because i had basically zero competition. The next generations will really suck at the game.