It's some poor miserable soul sitting at that checkout line 9-to-5 brainlessly scanning products, that's their whole existence. And you don't want this miserable drudgery to be put to end - to be automated away, because you mistake some sad soul being cordial and eeking out a smile (part of their job really) - as some sort of "human connection" that you so sorely lack.

Sounds like you only care about yourself more than anything.

There is zero empathy and there is NOTHING humanist about your world-view.

Non-automated checkout lines are deeply depressing, these people slave away their lifes for basically nothing.