By this interpretation, do we then have to take any subject that rock and roll touches as glamorization? The sound of Heroin is dirty and gritty, the lyrics ugly and honest. The few positive notes in the song "It's my life, and it's my wife," "And I feel just like Jesus' son," "And now I'm better off than dead" are hardly glamorous. They just underscore the theme of the song: allure of self-annihilation in order to escape all the ugliness around us.
People will glamorize anything that someone famous or iconic (both in Lou's case) put out into the world. That doesn't mean the artists themselves have glamorized the subject.. This would be like accusing Fight Club author Chuck Palahniuk of glamorizing incel culture and alt-right violence, when he was in fact intending to do the opposite.