I call bullshit. Unless he's lived in a cave the last 30 years, there's no way he can't name "Enter Sandman" or "One." Hell, Gen Z kids know "Master Of Puppets" just from Stranger Things.
I hate American football, haven't watched a game in decades, and I can still name a handful of players I learn about because I can't escape from the sport totally. I mean, this time last year I was blissfully unaware of the Kelce brothers!