That's not how it works in hip hop. There's a big difference between instruments and co production credits. I I make a beat. And u mix and add some shyt to it. We both getting production credit. That's just what it is brodie.
Again, regardless of genre, production credits don't change. If you make a beat, everyone knows that is only part of the song. Even in Hip Hop, without vocals you don't have a song UNLESS the joint is supposed to be an instrumental track. Who connects the artist and the beat? The producer. Sometimes, this can even require the producer to take the engineer role because elements in the beat are drowning the vocals and vice versa. They might add/subtract elements.
Those are key differences between making a beat and producing a song. It's why some artists will not accept beats and prefer working in the studio with the producer because they can work off each other to ensure it feels unique to them. It's the reason why Noah "40" Shebib isn't being sued or hit with a fraud label because he basically takes beats from other producers and turns them into Drake songs by adding and taking away elements.