So then the south pole would be the north pole? And would you have to change the names of the American continents and the country of South Africa? How about the states of North and South Carolina and North and South Dakota?
Not really, North doesn't have to be "up"
Well, There is a lot more landmass in the Northern hemisphere, so it makes sense that way
As far as I know, mainstream depictions of the globe are all based on convenience for navigation rather than any other factor. So...maybe don't overthink?