Of course, “always cheaper” in this case means less money up front, but much, much expensive more down the road than the initial cost.
Of course, the down the road cost isn’t usually that visibly connected to the “make it illegal” plan, so conservative governments love it.
The blue and yellow maps are flipped because they are on opposite sides.
The green parts are where opposite sides line up (through the center).
The “two” Antarcticas aren’t on opposite sides of the same globe, the Antarctica (blue) lines up with the opposite (yellow) northern Greenland (overlap in green). Just like the blue Greenland mainly overlaps the yellow Antarctica showing green.
Just find a spot on the blue map, and then look at the yellow map to see what’s on the opposite side (it looks reversed since you are seeing that other map from below.)