Its all about money and development team size. A is generally indie, AA is a small-medium teams, AAA is large teams. AAAA is marketing terminology because everyone thought that AAA just meant better.
The US knew that a major attack was being planned by bin laden months before 9/11. Bush, purposefully or ignorantly, ignored or minimized these warnings directly leading to the attack.
Wide sweeping generalizations of an entire population is quite literally the problem.