The tech necessary to replace front line service workers is not there. If it was we'd all be buying one to use as a domestic servant/slave. The robots in the article are more assembly line types, what happens when someone spills a coffee in some place 'unexpected', customer wants a custom frappadappalappachino instead of the regular drink, or something needs to be moved out of reach some customer needs help in a mill…
You can replace 5 out of 6, probably. Leave 1 as a customer service agent, and they handle all the special cases.
Personally, I welcome this, but it has to go hand in hand with some sort of universal income. We need to give everyone the chance to pick the job they /want/ to do, rather than the job they feel, economically, they have to do.
Researcher with masters degree on 21k/year? You could easily get double that from a programming job with a few years of experience if you have the aptitude.
I'd much rather receive a universal income, while working on things that I feel make a difference, rather than what I have to do to feed my family.