You seem very myopic with your analysis, you obviously know little or nothing about crime. Do you know that people rob stores were they are obvious CCTV cameras? So these things happen out of impulse, and greed.
Greed push a harker to steal Bitcoin, and if he succed , the same greed will push him to take it all. Imagine wasting time and resources to hack only to cart away with just a few token.
I am not sure if a harker identity is exposed if he steals huge token, we all know Bitcoin is decentralized and anonymous, so the hackers identity is completely safe.