This is more of a story question than actual gameplay or strategy. I have been reading the wiki and some other websites but I have not found an answer to this.
From what I understand is that Minecraft consist out of 3 dimensions. There is the Overworld, the Nether, and the End.
The Overworld is home to us, and our usual mobs. We have the ability to move to other dimensions, the other mobs don't.
The Nether is home to a new set of mobs. We can go to their dimension, but they pretty much stay there.
At last there is the End, home to the Enderman. Unlike all other mobs in the they do have the ability to travel multiple dimensions. This brings me to the following questions:
- Why do Enderman choose to come to the overworld and just pick up blocks?
- Why are they not traveling to the Nether and pick up blocks there?
Maybe there is no better answe than:
it's just a game and that's how it's programmed
. but maybe someone has a cool story behind this.