Retro-cycles are now a normal part of pop culture and have been for sometime. It is well documented that it's traced to the emergence of 1950's youth culture and their post WWII expendable income. You wait 20 years and there it is again. Lately Tupac and Kurt Cobian are commonplace, but you see that already.
To turn Kurt Cobain into a symbol of something -- to hold up his tragic passing as something other than personal tragedy -- robs his loved ones of their personal truths. It means that the discussion isn't about the fact that Frances Bean Cobain will never know her father but about some other capital-letter themes that become about art or figurehead outside humanity.