Of course what you've described are skills! But go back and read my post again... I was referring to people working at the front counter, who are just entering orders -- I was not speaking of anybody you've described.
The point is, the "burger flipper" or front-counter person doesn't learn any (real, useful, tangible) computer skill. Pushing buttons is not, by itself, a computer skill. Not even close.
If they don't give a rip, they only are expected to be cordial and reliable.