Much of our music and art and knowledge was brought back by few who could access the realm of where such exists in the 4th dimension
So does that mean that the likes of Star Wars, Mass Effect, Elder Scrolls, TLoR, One Piece, Bleach, DragonBall, etc. are not invented by sheer, overflowing creativity but rather experienced and brainlessly copied from their own existing realms? I don’t know what to think of that, tbh.
I mean, multiverse theory does state that it’s possible everything can exist in their own separate realm. Pretty sure Vulcans even call it “Infinite Diversity in Infinite Combinations”. But I somehow doubt the OP even understands that. And that’s even ignoring the nonsense that we somehow can not create, only copy, but others can, despite them also having “just” brains.
It does sound awesome though. Forget space travel, if we wish to leave this sinking ship full of nutjobs, idiots, and jerks one day, all we have to do is invent, I mean, copy interdimensional travel and voila! The hardest thing to do will be to determine a desired destination…