Who's to say it hasn't? Surely for criminal enterprises exposure has a negative correlation to success. In other words, we are only getting to see the attempts

Who's to say it hasn't? Surely for criminal enterprises exposure has a negative correlation to success. In other words, we are only getting to see the attempts that failed to be stealthy enough, there must be more impressive designs that we may never see... unless the assumption is that they eventually all get caught?