> It’s not unreasonable to consider jail time or even capital punishment for such gross negligence.

It is entirely unreasonable to consider capital punishment.

* an eye for an eye solves nothing - it doesn't bring dead people back to life, it just results in another person killed

* it's not an effective deterrent, it won't change how people act more than the risk of jail-time will

* it's unethical. It sounds like 'justice' if your idea of justice is simple retribution, but it completely undermines the concept of redemption - it advocates treating people as unfixable and unable to atone for their 'sins' and instead of limiting the pain and suffering - it spreads pain to more people

* no system is perfectly and inevitable you will end up punishing somebody with death based on faulty / flawed evidence that only later comes to light as being flawed/faulty. You can't bring a dead person back to life and say "sorry we got it wrong"

* finally - and perhaps most critically - tragedies such as these are almost the result of failures across an entire system with 10s, 100s, sometimes 1000s of people each culpable to varying degrees with many 'sliding doors' moments where such a tragedy could have been avoided had a different decision been taken. Sure you can always simplify things and point to the symbolic figurehead and say they are ultimately accountable and should take the ultimate responsibility for the group's failure (bonus points if in doing so you highlight how well paid they are to take on such a responsibility). But what you'll arrive at isn't justice and higher standards - instead you'll just have another dead person, killed in cold blood and the generic hope that somehow that additional death will act as a stronger driver of change than the already very real deaths that occurred in the tragedy itself.