I disagree about expectations. Boeing is expected to meet a reasonable standard of effort to build safe planes that can be competitive. Failures can and will happen, and in the same way we accept the risk of death by car accident every time we drive, no one is shouting "we must stop all air travel!!!" every time a plane fails and people die.

A really common sense standard of effort would be "people feel comfortable internally reporting problems". The opposite was true to the point that Boeing's management seemingly did everything possible to prevent people reporting issues. And now, potentially, someone with an interest in Boeing felt this strongly enough that someone was literally murdered over reporting a problem.