The same reason that Biggie was his "best friend" and not the dudes he actually grew up with like Jaz-O.... The same reason Kanye is the artist he's "most proud of" even though he never wanted to sign him...The same reason LeBron James was his "little brother" even though Sebastian Telfair was from the same town as him...
Victor Doom already has a classic coli thread explaining all of this...