90% of the world's population and 68% of the land mass being in the northen hemisphere is probably a good enough reason to put north up top on a map.
Your map should be bottom-heavy for stability.
We should put Asia at the top, Europe bottom left, Africa bottom right.
Its all arbitrary, and we can all make up random minor pro/cons all we like but it don’t change that.
As most people age, that gets less true. The optimum placement ends up being around an arms length away, so being away from the edge could help.
But if you're showing the whole world, typically the details aren't that important, so it's mostly arbitrary.
Though it appears we don't have any cities.
The southern hemisphere historically navigated using wave patterns and stars with maps made of sticks and stones. So I expect they have different navigational conventions. I have heard of an southern hemisphere island that provided on their navigational orientation based on a mountain top.
The pole star could also be part of this convention. The pole star appearing in a consistent point may also contribute to this standard.
No, the preference is conventional.
I should note, though, that Chinese maps were traditionally south-up. There's no reason to expect what hemisphere people are from to control that decision.
(Not only did the Chinese come from the northern hemisphere - they had an official orthodoxy holding that the north of China, where they originated, was morally superior to the south!
Nevertheless, they drew their maps with south at the top and referred to compasses as "south-pointing needles".)
Even in Berber?