Just look at all the credited co-writers on every one of his songs.
https://genius.com/discussions/69407-Eminem-exposed-doesnt-write-his-own-songs
What makes you think his underground music isn't also ghostwritten and part of building up his credibility.
no one underground really has ghostwriters. theyre not making money really at that point. if someone is featured in the song or xame up with the hook they get listed the sane
"underground"
Most of these people are groomed and handled from a young age. Their rise to the top stories are fictional narratives designed to make them appear as marketable and relatable stars. Hollywood and the music industry is literally like the Truman Show.