I'm not saying all criminals are stupid [Edit: stupid, careless, ignorant, poor at prediction, poor at risk calculation, take your pick] ...just that many are. And the really clever ones are often able to do it without even getting accused. So you're left with a group that has a LOT of facepalm-inducing members.
And sad to say, even filtering the list for people in high ranking positions doesn't help that much. Apparently "actually be a clever criminal" and "be a successful business person" don't overlap a lot. (I imagine "ABLE to be a clever criminal" has more overlap...but most decide not to.)
Side story: When I was a young kid (8?) my mom sternly told me "I don't EVER want to hear of you...committing a crime you can't retire on". Oddly enough, that was far more valuable than just saying "don't commit a crime". It had a logic my young brain could understand more easily than base morals or even evaluating the odds of getting caught. It inured me to a fair amount of peer pressure until I was old enough to decide for myself (and kids have few opportunities to commit huge crimes). Each kid is different, of course, but I recommend this to all parents of young children.