A mitigating factor for the criminality is that smarter people are usually less in need of committing crimes. Society values conventional intelligence and usually will pay well for it, so someone who is smarter will tend to get better jobs and make more money, so they won’t need to resort to crime (especially petty crime).
Additionally, if you have a problem which can be solved by either (a) crime or (b) doing something complicated to fix it, your ability to do (b) is higher the smarter you are.
A mitigating factor for the criminality is that smarter people are usually less in need of committing crimes. Society values conventional intelligence and usually will pay well for it, so someone who is smarter will tend to get better jobs and make more money, so they won’t need to resort to crime (especially petty crime).
It could also be that smarter people get caught less often, for any given level of criminality.
Additionally, if you have a problem which can be solved by either (a) crime or (b) doing something complicated to fix it, your ability to do (b) is higher the smarter you are.