Mapmaking is hard, because one is depicting thousands of 3D square kilometers on a tiny 2D map. That is why there are are so many different projections with mapmakers trying to communicate different things.
A globe being 3D is best in many ways but is also the largest change in scale; even an orographic globe is not to scale in the vertical orientation or it does not communicate the orography as intended. Even small easy local city maps are never really true even to 2D, because just the necessary width of lines blows the scale off; the lines depicting streets for instance are much wider than the streets themselves.
And all that is without the global issue of where political boundaries are to be drawn (e.g. Ukraine, Crimea, etc.). And IMO defining map boundaries will get more difficult as sea level changes force population relocations.
