So they make the food and Dre handles the plating and garnish but doesn't credit them for the recipe
Engineers get credited for mixing and mastering so that's separate from production. If you're not crediting those involved in the beat making process you're stealing.
It's no different than Beyonce getting songs from writers than demanding 75% of the writing credits. It's big name artists strong arming smaller ones. They use the excuse that the song wouldn't be a hit without them so they deserve all the credit. This is why artists and producers sign people but never let them release an album. They're just leeching off their ideas and taking their work. Dre had Warren and Daz around for selfish reasons.
I'll always have more respect for the ones who can make the beat AND produce the song or produce from the ground up. Enhancing a beat you were given is fine if you give credit.