Well if you really want me to buy even more shit online (let's be real, from Amazon) this is a good way to do it.
At best I don't like small talk or dealing with other people through meaningless interactions. At worst I might have minor social anxiety. I hugely prefer to just walk into a shop, grab what I need, check myself out, and leave.
At this point I'm also just as fast (if not faster) than the paid cashiers and baggers (who need and deserve chairs or stools by the way).
So yeah, if self checkout goes away, I'm buying as much stuff online as possible and generally making fewer trips to the store.