I'm confused too, self checkout is the best thing ever, no social interaction and pretty much equally fast, while allowing for more checkouts in the same amt of space. Though tbf only if done properly. One store here started having them like 10 years ago and there was like a 10% chance each item that you'd have to call over an employee bc the scale didn't work. Haven't had any problems with the ones i encountered recently.
Same here in Sweden. I never go to the regular checkouts because it is annoying to queue. Just scan everything while shopping. Put the scanner back, pay and leave.
Yeah, we've got those in Tesco and it's by far the quickest way to shop. Could even do with a super-express checkout just for those so I don't have to queue at all with the people who inexplicably want to scan a massive trolley of stuff really slowly at the regular self checkout.