Consider the record of the 737 MAX alone and up to the point where it was grounded worldwide. I bet that's not a great ratio of fight hours to lives lost compared to Boeing pre-merger.
FWIW the only person charged with criminal offenses in the 737 max is the chief test pilot, Mark Forkner[0]. Guess how many business degrees the guy has?
0: https://www.nytimes.com/2021/10/14/business/boeing-737-pilot...
but the reason its so safe is because there are so many redundancies built into so many different layers of the system.
once rot starts to happen, it’ll take the better part of several years or a decade for a wave of elevated fatalities to manifest themselves in these stats.