I kinda think, moriarty was created by canon just because Canon was too tired to continue this serie, so he need someone powerful to die with Sherlock, or be more preciously to kill Sherlock. So, moriarty may not need this kind of background. Not in canon's mind at least.
Sentiment is a chemical defect found in the losing side.
-SH
You need me, or you are nothing.
-JM
James Moriarty isn't a man at all. He's a spider. A spider at the center of a web. A criminal web with a thousand threads and he knows precisely how each and every single one of them dances.
-SH
