Trust me, it's not geography. Maybe this will help.
(Gimme a break, I drew it in MS Paint in like 2 minutes)
Anyway, do you see what I mean? The map on the right is entirely equivalent to the other as far as the placement and relations of the continents and both would conform perfectly to what all of the FE'ers are arguing for. But they clearly have entirely different geography! It's got to be one or the other, but either the sizes of the continents are immensely different or (if the sizes are the same between the two versions) the distances between them are.
With an RE model, switching the North and South poles is no big deal: if you turn a globe upside-down, it's still the same globe. But with FE, if you switch the edge of the disk with the center, you get a dramatically different object.