[robocat]

There is more than one selection bias in play.

1. Clued up criminals will choose crimes that are less risky.

2. The more ignorant the criminal is, the more likely they are to be caught.

3. When you are smart enough, there are legal ways to make criminal amounts of money.

Smart people either avoid crimes, or they avoid getting caught, or they do crimes with low penalties (some white collar crimes can have very high expected gains).