When I interviewed David Fincher about Mank for @vulture and @nymag, I asked him why he never takes a writing credit. We didn't have room for his full answer, but it's illuminating, and I'm happy to share it here.
@MarkHarrisNYC @vulture @NYMag I think this also speaks to the songwriting credit arguments that plague bands. How many bands have broke up over such squabbles? Everybody wants a cut. It’s both ego and greed.