That's fair, my point was just that you made it sound like "mature aerospace companies" were some special beings that didn't make mistakes.
It's good to learn from other people's mistakes, but you also can't let everything people have done before go unchallenged or no progress would ever be made from rockets that cost $2B per launch.
Yeah, I realize now that probably wasn't worded as well as it could have been. To say it differently, I would expect well-run companies (whether 'mature' or not) to have the processes in place to better control the well-known problems. When it comes to those 'unknown unknowns' sometimes you can't learn except by trial-and-error.
It's good to learn from other people's mistakes, but you also can't let everything people have done before go unchallenged or no progress would ever be made from rockets that cost $2B per launch.