Why do threads mentioning NPD bring in people saying America isn't WW?

[forest-spirit]

But this is about NPD! It's US sales data! If you have no interest in US sales data then why visit an NPD thread at all!?

It's like going into a "Famitsu/MC thread" and saying "Japan is not the World"...or going into a "Others UP" thread and ask why they only mention sales data from EEMAA.