[David Johnston2]

GURPS Fantasy expanded the number of spells that can be enchanted into items. Then there is natural magic.

And if Yrth had invented industrial enchantment magic items that can do that kind of thing would be more than rare treasures frequently warred over and stolen. But it hasn't and most of the enchantment efforts of wizards are directed to aggrandizing their own power. They don't even have mass education.

Any feudal lord or Bishop with a brain in his head understands that a happy and healthy community tends to be a loyal community. He rather then the village would pay for the priest (why risk their minds being poisoned by heretical/pagan ideas that could lead to rebellion or the lost of their immortal souls?)

But how many plant magicians do they have to go around and what other claims do they have on the magician's time? Their resources are limited as well. This kind of reasoning if applied to the real world would make a bunch of nations imaginary because they have food shortages due to logistical and economic issues.

Cite the page number where it says no Greek Orthodoxy communities were transported to Yrth. Absence of evidence is not evidence of absence.

It doesn't absolutely say that none were because they didn't want to rule out possibilities but it does say that most of the abductees from Europe were from Western Europe. And in fact it doesn't absolutely say that flavour of Christianity doesn't exist, just that the Megalosian Christianity is the state religion and Caithnite Christianity is a breakaway entity that isn't terribly different.