I unironically believe a small but not completely insignificant amount of this has to do with a number of the greatest and/or most famous political and social heroes of the mid 20th century being killed/assassinated before they had a chance to get slightly older and therefore publicly more flawed
Thereβs an entire plotline of βRed Dwarfβ that where they accidentally thwart the Kennedy assassination while on a quest for curry. Then they have to fix the entire timeline.
I think about this a lot wrt musicians who were in the 27 Club.
Considering the vastly different life paths that Dave Grohl & Krist Novoselic took, it's not insane to imagine a really unhinged 50 year old Kurt Cobain.