Why do you think the southern hemisphere is mostly ignored? genuinely curious.

Why? Because we are a small fraction of the population and economy of the planet.

How? Most of the population in the southern hemisphere is in ex-colonies from the north; our cultures are thus full of concepts that don't really work but we make do. Simple things like all the holidays being inappropriately aligned to the seasons, or the constellations in our skies being afterthoughts in the system, or of course maps being north up without a second thought.