Don't your investors oversee cutting of corners like recycling old designs to the breaking point? Or hiding critical new workarounds in the shallowest possible training?
"the sole fiduciary duty is to deliver profits" is a reductive meme at this point. The problem is putting short-term over long-term, and that's a choice Boeing executives made. Of course the system incentivizes this, especially if you get away with it. But they didn't.
Most shareholders hardly have a say on how major public companies are run. Thr Only signal they have is by buying/selling stock or not even that if you only own your shares indirectly through an ETF.