I saw a cockroach in my kitchen. Killed it. Since I have only seen one I should assume it was a statistical anomaly and there isn't a hundred hidden ones I didn't see.
I have been in industrial/infrastructure way too long. When you see things like this there are problems you aren't seeing. And I find your attitude grossly irresponsible. You don't wait until the problem grows and people start dying in massive amounts before you decide to fix a problem, especially when the problem is tightening a fucking bolt. This isn't some crazy black swan event know one coildnhsve foreseen. It is applying torque for the right amount of time to a bolt.
Boeing has been having issues for a very long time. And it has all been the result of their short term cost only focused structure. Kept cutting corners, kept refusing to invent, kept on outsourcing to save money. And now we are seeing the results of it. Maybe they should go back to make things that fly well instead of being a company that knows how to temporarily inflate their stock price well.
How many more incidents need to keep happening before you will stop hail corporate them?