Any jobs displaced will result in a multiple of new jobs created with the new opportunities it unlocks.
I’m not saying we’re in a post-scarcity situation yet, by any means, but it seems inevitable that if humanity continues in the same general direction, it’s only a matter of time before it happens. At which point, such a discussion is unavoidable.
I think customers also benefit. If a janitor costs $100/day and that’s automated away to a robot with $20/day costs that $80 will be passed on to the customer (just like every other technology innovation).
But automation has really benefitted customers through lower prices and higher quality so it’s hard to expect that these robots would result in owners pocketing the savings over previous robots.
It's complicated.
If the value of automation were distributed differently it'd be great. If workers owned a company such as in a worker-cooperative structure, then the workers would be happy to focus less on stuff they don't like and focus on different things. Or a strong state could impose taxes on highly automated industries to fund a kind of universal basic income. But under our status quo, automation benefits the capitalists much more than the general population.