It's a good point that this is a US-based organization, but I don't think the parent is looking for a different focus from this post. Rather, they're asking that given Python's international influence why aren't organizations from more countries (or the countries themselves) contributing? My gut feeling is that it's because the PSF isn't looking outside the US for those sponsors. Here's their sponsor list btw:
https://www.python.org/psf/sponsors/