I wonder how many of these are people being silly. Written English doesn’t really do sarcasm well, and you get these waves of “are people really this dumb” every few months, and I can’t help but think they probably aren’t. I mean McCartney was at a Super Bowl not long ago, he’s not exactly unknown to young folks even if they’ve never bothered to explore so-so 60s pop.
He headlined a Coachella stage a few years back too.
The twitterverse knows more than they are letting on.