I get it if you've got a lot of items. I normally used a manned checkout at Crest.FWIW - Lowe's tells you which aisle and bin # too. Home Depot is worse in my opinion, at least the one in Moore. They completely redid their self checkout area with new, big monitors and someone to assist so promoting not having a checker. I don't mind self checkout but not if I've got 15-20 items.
Heard there's a WalMart in Dallas area that has zero check out lanes - it's ALL self checkout. I refuse to self checkout at a grocery store when my cart is full thus why I prefer WinCo in Moore. They ALWAYS have a checkout person and will add another if the lines get too long. Yeah, crazy logic huh?!?!