This is reality. Decisions aren’t kill/not kill.
It’s much more ambiguous and murky, especially when dealing with low probability events. That’s why it takes expertise, but it doesn’t mean there shouldn’t be accountability for those “expert” decisions. Other engineering domains already have this, there isnt anything that makes these decision inherently different.
You're talking to someone who spent years working in the aerospace industry. I'm not sure, but it seems like you have some hypothetical idea of what reality is, but it doesn't align with my actual experience. Not to sound disrespectful, but it sounds like one of us actually has experience and the other is going off a narrative they've created in their head.
I do hear people often talk about the "incompetent patsy" excuse. But I'm curious, where do you think that stops being relevant? Do you not hold medical doctors liable for decisions because a patient will just find another "incompetent patsy" to prescribe them whatever they want? Do you not expect civil engineers to be responsible for a structural design of a bridge because a company will find an "incompetent patsy" to sign off on a sub-standard design that is better for profit margins? We're used to holding all kinds of professionals liable, but there seems to be a cultural shift in the last 40-50 years where we've rationalized bad behavior as the norm rather than holding people accountable.