Part of the reason that air travel is as safe as it is is because governments held both airlines and manufacturers accountable for planes crashes or other air travel incidents, especially those leading to death or expensive property damage/mishap. You have to have significant training and flight hours to be a commercial pilot.

In the cases where Boeing has been found (through significant investigation) to be liable for death or injury, they have been held accountable. That’s literally why the 800 maxes were grounded world wide. Literally why they were forced to add further safety measures after the door plug failure which was due to their negligence as a manufacturer.

apnews.com/…/boeing-ntsb-door-plug-737-alaska-air…

…mit.edu/what-boeings-door-plug-debacle-says-abou…

en.m.wikipedia.org/…/Boeing_737_MAX_groundings