It's still a very broad generalization to describe Japanese society, one that is impossible to prove. I don't think anyone thought you meant Japanese automakers were the only ones capable of quality, but that Japanese society demands quality moreso than other societies, which I argue is false, given the number of lackluster, lesser quality automotive brands out of Japan, even ones other than scandal-ridden Mitsubishi like Mazda or Isuzu or Suzuki - which last I checked do fairly well in Japan.