Weren't people saying the same sort of things when the "assembly line" was first invented? After all, the main purpose of the "assembly line" was to make the same amount of stuff with fa fewer workers than had been needed previously.
Well first off you're not looking back far enough, during the first industrial revolution there was massive unemployment as machines replace skilled artisans and craftsmen with cheap, expendable factory workers that could receive minimal training in their one task on the line. The assembly line actually comes very late in a mostly industrialized society already and an old fashioned manual assembly line still employs a considerable number of people. And Ford famously doubled wages to get retention up, because the assembly line work was actually getting complex and needed trained workers.
This time we're not just dividing and rearranging the way workers produce their product, we're cutting the humans entirely out of the equation except for meta-roles like designers, developers and repairmen. For example take the banking industry, it used to be huge with branch offices all over the place. ATMs were the first blow, now online banking has reduced it down to next to nothing. I just checked the figures on one bank I know, 250 FTEs (full-time equivalents) supporting 380,000 customers.
Think about it, in how many service industries is the human staff actually a service? When I go to the grocery store, what I want are the groceries. I don't care if robots automate the whole shop if they keep delivering the same service and quality. When it comes to water/sewage/electricity/internet etc. I'd rather not deal with them at all, I pay a bill and it works. If a lot of those jobs disappear at the same time and I don't mind seeing them go, but I'm paying nearly the same for the robot/self-service service there won't be much left of my paycheck to pay whatever new jobs these people have found.