All of our cosmological beliefs are eventually found to be false. First the earth is the center of the universe than the sun. Newton loses to Einstein. And the changes since Einstein are amazing. And really. It just boils down to a growing perspective. All the planes in Eberron are present in planescape. It’s just perspective.Not really. Eberron and Dragonlance are no sillier than many real world cosmological beliefs. Planescape makes all beliefs in the entirety of D&D into BS that ignorant losers believe because they don’t know any better. That is a whole other level of bad.
Yeah I don’t know a single person who believes in any gods who would agree with that.
Gods are an existentially different type of being from anything else.