I didn’t new freezer was a Kendrick song

Plays a part ? lol even george clinton said kendrick actually does everything.

The producer get enough credit (and they get a lot of credits actually)...the fact that these producers work for every other rapper, but are only "activated" when they're under the supervision of kendrick kinda says a lot. So yeah its only right that the credits go to Kendrick...and they're humble enough to admit it themselves

Being able to do something is easy, it's only a matter of practice and work, but knowing what to do and when to do it is a whole challenge. You can see this situation from an another angle...just imagine that kendrick is the "ghostwriter" of their beats.