Rap built its art form on lyrics. The main thing about rap is being able to come up with great rhymes. That's what made rap what it is. Pop music, RnB had other factors into like charisma, voice, range. You can have someone who couldn't sing a lick but could write Whitney Houston a chart topping ballad. Because not everyone could sing. But everyone can write. You understand? When hip hop first started, it was about who was the best rapper. Who had the best lyrics. Now the game is changed to where the best writers can pen chart toppers for people like diddy or Dre who weren't really rappers, just producers. To me, if you use a ghost writer, no way should you consider yourself top rapper in any thing.