Ah I am the opposite, I prefer the self check outs so that I don't have to talk to anyone. I don't know why but I always feel obligated to think of something to say when going through human checkout. If there's an issue with the machine during check out that can be a bit anxiety inducing but the issues are fairly common so I just sort of shrug and am like "it just started beeping" and they make it stop within a few seconds.
For the same reason I've been cutting my own hair for nearly 6 years now lol
That has nothing to do with the comment you replied to.