That's not how the law works. If you lie to get someone's money, that's fraud. If you take their money, that's theft. People being taken by obvious cons don't make these things not theft or not fraud.
That's not what I am saying. Bank vaults among other things prevent many bank robberies. If someone does not rob a bank then they are not a bank robber.
The above says nothing about people who do rob banks.
The above says nothing about people who do rob banks.