Holy shit dudes
As someone who has worked in both the film and literary world, this is great information and something they teach at some film schools.
For film: Always have something you are prepared to sacrifice to the producers so you can ignore the rest of their ideas. There are too many of them and 99.9% of their ideas are things like, “have you thought about adding a dead wife?” or “what if they were all cis white men?”
For books: Do not do this with book editors. They, unlike producers, know their shit. They will make your writing better. Listen to them.