Why do people at the bottle return act like they've never seen a aluminum can before?

https://midwest.social/post/44654711

Probably because, like most of us, they are underpaid, under trained, and over worked.
I remember when I was in high school working in a grocery store bottle room, crushing all the cans people brought in. Those jobs are gone, now the customers put the cans in themselves, and the machine detects and sorts them into the right bin.