Why is it different for hip-hop?
Some say the DJ was king in hip-hop.
Kanye and Dre were also beatmakers. They worked the MPCs and drum programming. Dre also played keys and mixed.
Puff, self-admittedly, was never a programmer. He started his career as a party promoter which meant he had to know what was hot in the streets. What the people wanted. He used those skills when it came to production. He had the ear for what sounds would work. That is a skill a lot of people lack.
Embracing the 'traditional' producer isn't a diss to beatmakers at all.
There is a role for everyone who contributed to hip-hop music.