That's an overly cynical take, post-mortems are not for anyone's reassurance, they are a learning opportunity. The airline industry is as safe as it is because

That's an overly cynical take, post-mortems are not for anyone's reassurance, they are a learning opportunity. The airline industry is as safe as it is because every accident gets thoroughly investigated with detailed reports ("post-mortems") including what to do differently going forward. These are taken as gospel among all players in the industry and as a result, you very rarely see two different accidents caused by the same thing anymore.