Not everybody needs to know the same things.
It’s not essential information, but a basic awareness of popular culture never hurt. I’m not even a Sinatra guy, but I know who he is and what his signature tune was.
The old joke about people who think Paul McCartney’s first band was Wings is being replaced by “Paul who?”Yeah but I’m sure you don’t know stuff that people thirty years older than you might.
Or thirty years younger for that matter.
Like the stuff you like, don’t care what others think (or maybe introduce them to the stuff you like if you really mind).