I think that's a fair and charitable reading, that maybe they've just overgeneralised a bit, or maybe just haven't chosen the exact mix of examples they "should

I think that's a fair and charitable reading, that maybe they've just overgeneralised a bit, or maybe just haven't chosen the exact mix of examples they "should" have. The ideological lean, though it may have been completely innocent or accidental, stood out to me.