This point can easily be extended. If you drive to Target instead of hiring porters to carry you in a litter, you're killing jobs! If you use a washing machine to do your laundry instead of hiring people to do it by hand, you're killing jobs. And so on.
There are many ridiculous economic fallacies in public discourse. But the "eliminating jobs" attack on self-checkout is one of the dumbest.
I've said it before, and I'll say it again. If you want to avoid doing anything that kills jobs, the only way is to adopt the full Louis XIV lifestyle, where servants literally wait on you hand and foot. When the Sun King got up in the morning, specially trained servants put on his clothes for him. If Louis had to relieve himself, a valet de chambre would wipe the royal rump and dispose of the royal poop. You too can adopt the Sun King lifestyle, and thereby never, ever eliminate any jobs! If that doesn't sound appealing, then we may have to accept the idea that labor-saving devices often have great value.