As someone who has shoped in the us but lives in europe, that only applies to the us. Self checkout is objectively bad in the us. Here, it is actually pretty good. The only anti theft mechanism is a random check wich happens like once a year to me, no weighing bs. Especially, if you use the option to scan while shopping with your phone or scanner device. Then you just pay in the app and leave, no hastle at the cash register.