...but the last sentence if kind of important, right?
We only know about the criminals who got caught. Which probably means they did something dumb.
It's conceivable to me that there could be many—maybe even a majority—of criminals we don't know about because no one ever caught them. Maybe they committed fraud once, decided not to push their luck, and lived the rest of their life quietly. Maybe they killed someone and made it look like an accident, and no one ever suspected anything. How would we know?