No one is disputing the obvious fact that David didnt write anything for The Final Cut. Its the reason he didnt thats interesting. That reason is also a well known fact, this was the album Roger wanted to make, so he did. David argued against in the beginning but finally gave up and told Roger he could call if he needed a guitar player, and left the project. His music wasnt welcome on that album, so he made his own. It was definately not a question of neglect towards the band.