Definitely a yes-and scenario here. I was a cashier, I'm good at finding and scanning bar codes and PLU lookups. I was a damn fast cashier. That's impossible in a self checkout. And then you get carded for a can of spray paint, and the one attendant for 8 machines has three people with blinking lights. On top of that, most of these self-checkouts are not designed to handle a full cart of groceries, but also why do I want to do the work of ringing up and bagging a full cart of groceries by myself?

For the most part, in practice there's little or no advantage for me, the consumer with a cart full of groceries.

One exception was 2003-era Martins in Virginia - Walk in, grab a cart that had bags attached to the front, grab a portable scan gun from it's charging dock. Scan and bag as you shop, dock the gun to the checkout register, show the attendant my id if needed, pay, and I'm done. No unloading and reloading the cart, no fiddling with plu lookups, fumbling with bags, etc. It was actually glorious, but relies on trusting your customers. Corporate stores seem to trust me even less than I trust them.

I'm somewhat ok with these things as a secondary 10-items-or-less option. But for the love of god staff enough cashiers to handle the grocery-shopping-Sunday crowds.