I like the part where they try to justify it by saying different countries have different rating agencies and what is acceptable in one culture may not be acceptable in another.
I'd buy that if these games were sold side by side at gamestop but they aren't. While I know there are a couple import stores out there that do sell games, they are largely the minority making gamers have to specifically seek out websites that specialize in imports. Their reasoning just isn't believable.
There's also the angle you could either lock out importing entirely, finetune based on each rating system, or do something automatic based on the desired rating. Nevermind that while on average each country has different values every single person
has different values, just because a game got an M in the US doesn't mean people won't lets kids under 17 play the games as CoD readily shows. It's just a lame excuse with Nintendo being as obsessively protective as usual, though hopefully constantly drawing attention to this will make them eventually realize it is possible to address that in ways that do address some people's concerns.