@beepboop1
@davremedy
It's implied that the current technology on Earth is also somewhat magical in nature. And even then, it seemed that while humanity is capable of launching satellites and slightly more advance on the tech level of us IRL, they haven't reached the level of space colonization. Hell, the distance between the moon is 3 days of space flight, further hindered by the need for fuel and rations so any military attempts are nil.
As for while the moon surface is the place. I'd assume that it is a combination of close distance to Earth. The need for sunlight. And the significance of both the Sun and Moon as celestial objects in occult practices. Mars is both too far a planet and being, well Mars, symbolizes the male/masculine elements in the occult, unlike Moon which symbolized more feminine aspects.
Can't wait for magical colony drop on Earth Gundam style, though.