I think a greater proportion of the tourist population are individuals that visit Japan and maybe haven't done enough research, or are just unaware of norms here. Not understanding where to queue, how to order, navigate public transport, what to do at a temple, onsen, etc. This group isn't the 15% of "Best in Class tourists" Craig writes about, but rather the 75% that want to be respectful and don't know any better.
Many locals/expats will see this group and look down in disdain (or lament about them in a blog post...), but why don't more people just ask if they need help? It takes little effort to point someone in the right direction, and if it helps them better understand the country it's a win-win for both tourists and residents alike.
I feel like people love to talk about how considerate Japanese culture is, but don't care to practice it themselves when given the chance.