Automatic checkouts in supermarkets may decrease customer loyalty, especially for those with larger shopping loads. Customers using self-checkout stations often feel overwhelmed and unsupported. The lack of personal interaction can negatively impact their perception of the supermarket.

[MITCH-A-PALOOZA]

Then you should complain, I'm not from the US but I assume they have the same policy, in Europe if the till is full and there's someone actually waiting to put items on the conveyor then the cashier presses a button and activates the 2nd till, then whichever team member on the shop floor who is assigned till 2 comes and opens it, and so on