Perhaps the best example of humans doing this sort of thing is in music. Artists take samples from one another’s works and use them to create new music.

I think the problem the GP highlights is roughly analogous to the case where an artist takes all of their samples from the album of one person and uses it to create a new song that sounds like the original artist made it. That’s a different thing entirely from taking a sample from one artist and a sample from another and then combining them with a new original beat and layering on some other original tracks.