Recently, all of the Walmarts in my area still have their self check out machines, but now there is an employee in front of each one and they treat it like a no

Recently, all of the Walmarts in my area still have their self check out machines, but now there is an employee in front of each one and they treat it like a normal register. I would bring my cart over to them, and an employee will scan each item at the self check out. As someone who would rather just use the self check out to get in and out, it's been a bit annoying. When I asked an employee why they are staffing the self check out machines instead of the actual registers (which are still empty), she responded in saying that the self check out machines have a simpler interface than dealing with the traditional cash registers so they have begun using the self check out machines instead.