iirc Hannah Gutierrez-Reed is a nepotism baby who never should have been in charge of anything, ever

Yes. Her father was a movie weapons guy.

The Rust tragedy actually caused Hollywood to fire a lot of these jackoffs who got production jobs just because their uncle has some clout in the industry.

I seriously doubt that has happened except maybe with a handful of people handling guns specifically. Nepotism is built into the DNA of Hollywood and the large majority of people involved have a vested interest in keeping legacy jobs open for their kids to have an easy life.