Scenario 1 is Starship is run as competently as Falcon 9. If this is true, then basic errors won't have escaped the QA process, just as they don't for Falcon 9, the safest rocket ever flown. So, we would conclude that the issue must have been a complex one that eluded the competent QA process.

Second scenario, Starship is not run as competently as Falcon 9. That is also a huge problem, because it's very hard to fix people and procesa problems in general.