By who? I never heard this before. I have rarely seen The Girl Is Mine mentioned anywhere. I've seen magazines saying Ebony And Ivory by Paul McCartney & Stevie Wonder was a bad song and comedians making fun of it. Anyway like I said it would have been played on the radio anyway since Paul McCartney was on it, single or not. At least in the USA. Back then R&B, AOR, and Top 40 radio would play album tracks. Years later, after conglomerates like Clear Channel bought up a lot of commercial radio stations, this was largely stopped. Also does I Just Can't Stop Loving You represent what was on Bad? It was the first single. Black Or White does not really represent Dangerous either which is half New Jack Swing including the title song. So again you're talking nonsense.
Only 2 out of his 7 adult albums have lead singles that are not representative of their respective albums, i.e., ‘The Girl Is Mine’ (from the ‘Thriller’ album) and ‘I Just Can't Stop Loving You’ (from the ‘BAD’ album), the rest 5 lead singles are representative:
‘Don't Stop 'Til You Get Enough’ is an up-tempo, dance song with disco elements, so it represents the ‘Off The Wall’ album.
‘Black Or White’ is an up-tempo, dance song that touches upon racial/social themes, so it represents the ‘Dangerous’ album (given the album’s structure, even if a new jack swing song was released as a lead single it would not really have been representative because half of the album’s songs are not new jack swing songs).
‘Scream’ is an up-tempo, dance, aggressive and angry song, so it represents the ‘HIStory’ album.
‘Blood On The Dance Floor’ is an up-tempo, dance song with a dark theme, so it represents the ‘Blood On The Dance Floor’ album.
‘You Rock My World’ is an up-tempo, R&B song with dance elements, so it represents the ‘Invincible’ album (even if they released ‘Unbreakable’ as the lead single, as the original plan demanded, this song would also have been representative of the album).