Yes, this is essentially the same reason why you don't see robots flipping burgers. The automated equipment would have to get very cheap to be cost effective.
My current thesis is that robots (have to sense the world, make decisions, move freely, and respond to stimuli) only make sense in markets with labor shortages.
AKA - if people are willing to do it for cheap, it probably won't make sense to get a robot involved.
I haven't heard that thought before, but it's an interesting one.
Probably won't help with any of those folks opposed to UBI because "people get meaning from work." Proponents of that view must know a hidden trove of self-actualized retail workers.
