Can you describe why there's a big push for self checkout?

Fewer employees to hire and manage. Seems like a straightforward benefit. I haven't seen a fully staffed grocery store in what feels like fifteen years but is probably more like five. This feels like a continuation of the same "disruption" that predated widespread self-checkout.

There are also people who claim to hate interacting with cashiers but I have a difficulty imagining this is the majority of people.