It's really very extremely simple.
You're in charge of a safety-critical business.
You make decisions that trade safety for profit.
People die.
You are charged with murder and go to jail for a very long time, just like any regular citizen.
This really should not be controversial or complicated. If you kill people, there are consequences. That's how the world works for 99.9999% of the human race. The same standard should be applied to CEOs as the proxy for the corporate entity that they are.
To argue anything else is to argue that so long as you have enough money, it's perfectly acceptable to kill as many people as you want in as gruesome a fashion as you'd like.
The price of being a scumsucking robber baron murdering thousands of people for profit should be extreme. The profits gained from such behavior should be clawed back with the full force of government from any source even remotely related. The company should be gutted and auctioned off, or nationalized if they're "too big to fail". Investors immediately and irrevocably lose all stakes, no exceptions. All recovered moneys should be distributed to victims and families.
Boeing never should have happened and it should never happen again. But this behavior and exploitation and mass murder will not stop so long as it's profitable and murderers just walk away with zero repercussions and keep their billions in blood money.
Boeing is not a case of incompetence. This is a case of pure and simple greed. They've ignored safety reports and FAA guidance. They even rigged the FAA inspection process to let them rubber-stamp things in-house (while ignoring failing reports). This has been a long decline and they've made the worst decisions the entire time.
Even if it were incompetence or ignorance, it absolutely does not matter. If you run over a kid because you were texting or simply not paying attention to the road, you go to jail. If your incompetence leads to hundreds and thousands of deaths, you should be just as culpable.
Stop making excuses for billionaire mass murders. Drag them to the gallows instead.