I hate this self service world. I refuse to use those self service registers at the stores. I say very loudly "I won't use those on principle.
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I also will NOT use those things, and not because I can't.
I was asked once in a store like that what I would do if this store had no clerks at all. I just smiled and told them I would go somewhere else. There would always be some Mom and Pop store that would profit from such a world.
As it is it's hard enough to find a clerk (sales rep or whatever fancy name they call them now) and it seems there are fewer and fewer every year. I have a very low tolerance for searching for what I want, and after so long I simply give up and leave.