Yes, I agree: Bitcoin is probably easier to steal from people who don't know what they're doing. (And yes there is probably is smaller chance of the thief being caught).
But as of now, properly secured Bitcoin can't be stolen by any criminal, government, or bank. Even if they have physical access to the owner's shit!
The same cannot be said for any modern national/fiat electronic monetary system.
The 'tech' is, more or less, the easy part. The hard part is all the people involved, and getting them to follow the rules. Sure, you make the tech more resilient to human 'error', but things like MtGox (or Bangladesh Bank) still happened.
Just like using a bank account in the real world involves not divulging your account #, bank website passowrd, SSN, birthday, etc.
Sorry, $951M was stolen. All but $81M was recovered.
http://www.reuters.com/article/us-usa-nyfed-bangladesh-malwa...
But let's put this in perspective. MtGox lost BTC600k. As a fraction of the primary money supply, that loss was comparable to a USD loss of about $35 billion (M0=$1.2 trillion). So even before most of the Bangladesh money was recovered it was only 1/30th the size of the MtGox loss. And MtGox wasn't even a theft, it was simple mismanagement. Imagine the attacks people would start to mount if they could net the equivalent of $35 billion (or more) risk-free.