I like Kendrick, but the most important musician alive? C'mon mAn. The people who played on his album are more important than him.
kendrick wrote most outro & hooks for the album, he also recorded demos to show the artists what melodies to use and all that shyt
and the only producer (according to soundwave) who was free to add his own touch was Kamasi Washington.
Soundwave also said Kendrick writes everything, and then he forwards it to his musicians who adjust it. Maybe correct him somehow, or just give him advice. Bilal also said that kendrick was singing the melodies of the beats, he was telling them exactly what he wanted the beats to sound like and what instruments to add on pretty much every part of the beat.