I mean let's be real, using session musicians and chopping up/arranging their work is literally no different from using samples, one just involves digging for old records and the other is commissioned. Once you get on the boards, you know.
If I tell a session saxophonist, "Hey come up with some shyt and play it on top of this for the hook" that's effectively the same thing as me scouring jazz records for a saxophone melody I like

But again, because the definition of "producer" in hip-hop is so muddies, there's all these weird semanticw wars.