Then there's the case of Earth's two quasi-moons.Oh man the tough one. While I believe that with the universe as large as it is the odds of another earth with intelligent life must happen. However I think the Drake equation is to friendly. I feel earth may be the only planet with life in the Milky way. Not 10,000. Earth collided with planet Theia that both knocked it on its axis, and created the moon, but also caused the 24 hour rotation. All 3 were critical for development for life.
On the creation side if you were a god and wanted a faith based system and wanted to create different earths wouldn’t you just place 1 per galaxy?