Suddenly a Minecraft nether dimension logic came into my mind.

Why travelling 1 block in Nether dimension is equal to travelling 8 blocks in OVERWORLD?

If Nether & Overworld are co-existing and Nether is under the Overworld and earth is Round.

So in Minecraft nether dimension is actually in the core earth ????.So it's more likely a place rather than a new dimension. Nether is inside Earth. So it should have a much lesser circumference length than earth ????.

That's why travelling 1 block in Nether dimension is equal to travelling 8 blocks in OVERWORLD.