So both manufacturers are guilty of producing sub-standard designs that slipped through a supposedly stringent certification process? Just remind me, this is the 21st century isn't it?
No, it's the 22nd century, you've been asleep for a while.
Anyway I agree with your sentiment in theory but the reality is that design errors get through due to certification weaknesses. But whilst there is room to improve the certification process it will never be perfect. There would be a danger of creating such a certification burden that no new aircraft could be certified and then we might have to do something really crass like spend our lives flying around in 1960s technology helicopters.
IMO what we need is a certification process based on knowledge, experience and "cleverness" rather than the one we have at the moment which is mostly based on bits of paper.