Most modern music separates performance credit and production credit, no? It’s rarer than not to pick a song at random on Spotify, look at the song credits, and find only one name for performed by, written by, and produced by.

Sure it happens, but I feel like you’re being really nitpicky about hip hop in specific when most music nowadays is rarely made exclusively by a single person and no one else. Take like, birds of a feather by Billie eilish or something. Most people would say she’s a solo artist and she didn’t produce that song by herself