Personally, I think people who generalize and complain about Lemmy or Reddit as if they're some sort of monoliths or "hiveminds" are the ones with the shitty attitude.
16oz is a pint and most US bars do serve drafts that size... And I'm pretty sure it's a carry over from the UK where it's always been common to order a pint of beer.
"Imperial pints" in the UK are actually 20oz interestingly enough though.
Seems like they typically get larger standard sizes of beer than us and I think we should follow their lead.
It's really just a health issue.