So while I would agree that there is high value placed on things being 'perfect', I would disagree that Japanese culture sees symmetry as the ultimate expression of perfection… I would say they see 'asymmetrical yet balanced' as perfection.
How trivial can they get? One item came back with 'dirt on screen', with an arrow-sticker pointing at it. The tech here picked it up and touched the dirt with his finger... and it fell off. Nothing else was wrong with the unit. For this, the unit had a return-trip journey across an ocean...
wabi-sabi doesn't even really need to have anything to do with quality.
http://en.wikipedia.org/wiki/Yumi
Generalism may help paint ourselves into nice little circles for easy digestion by our brains but let's at least give it a fight :-)
Then that would be a fact, not a generalization.