I never understood that, why do camera companies do that? I am sure it all comes from the same factory. I guess it hinders people from buying overseas at cheaper prices if their currency is doing better but still.
Because there is a bigger separation between international arms of a company like Sony than you might guess. Financially, for sure.
Servicing another financial arm's products is a liability on their balance sheet that can't be recovered.
I agree though, they should figure it out and co-support the products. If they want to leverage the Sony brand globally (and of course they do), then it should be supported globally by agreements between the regional arms to support each other's goods. The whole "not my problem" approach does nothing but harm to the brand.