They should be. In cases like this, and Boeing, is infuriating that it’s always a low-level fall guy that goes to prison, and never the managers and execs that personally made the decisions that led to the deaths.
Like you said, it requires proof, but what I’ve heard is that the competent film crew had issues with production, so they got replaced with people like Hannah Gutierrez-Reed who were far less qualified: latimes.com/…/alec-baldwin-rust-camera-crew-walke…
Frankly, to me it is unacceptable that people can decide to cut corners like that, and when people die as a result, the company pays a fine (as with Boeing) and the people ultimately responsible go on leading the company (or film production or whatever).