That’s not the full story though because there are random spot checks and they’re very very annoying when they happen.
Another related problem is that you physically can't leave the store unless you buy something and get a receipt to scan. You have to tailgate someone with a receipt, or hop the turnstyle, etc. Hope you're not in a wheelchair and change your mind / the store's out of what you were looking for!
Also those stores, at least where I live, have no physical barrier to exit.