When I read DeWitt, I realized how important the contexts were. For myself personally, when I study for my own pleasure, that automatically includes wanting the pleasure of those I'm close to. Not a whole country
That is the impression I got from DeWitt too and I think it is persuasive. I have read many times in other places that Greek education was heavily oriented toward "producing good citizens." if so, that would make total sense with DeWitt's interpretation -- that we are educating ourselves (in philosophy and in most all else too) not "for Greece" but for ourselves. Which does not mean that Greece is not an important part of our world, but that ultimately Greece itself is not the highest value - especially if "Greece" is not the equivalent of "our friends." Under the right circumstances I could imagine that the two could be roughly equivalent, but the larger and more problematic the political situation the less equivalent that would be.