Finally, someone outsmarted this snake. Arya would have been an innocent pawn, likely grow up just like her father Ned Stark. But with the cruel twist(s) in her life, she received the training on her life. And able to double-edged this baddie.
We can all learn from this. The world is not fair. We should learn how to fight the banks, the cleverly hidden corrupt system.
There's a dedicated top cop who exposed everything the govt did in the documentary "Collapse". Yet the majority still weak since by greed (by capitalism) they thought they will have a chance to join the 1%.