it’s not really baffling or embarrassing, but in about 2015 i was sitting next to an old guy on a PC, and he didn’t know how to use a mouse. He had in fact overestimated how it worked - he was picking it up and pointing it at the screen and gesturing. like a Wii.
Incredible question. Circa 2012 I worked for a large well known telecommunications company, my only private sector job ever, and a person from the ad department sent me an ad that linked out but with no link. They asked me what a link is.