Becoming an FBI agent used to require a law degree, or some equivalent speciality. Now they are taking FBI agents who have fucked chickens.
If an applicant is not smart enough, or focused enough even to get a high school diploma, they are probably not going to do well in most jobs that require thinking. There was a time that intelligent young men would drop out of high school without being complete idiots. They were needed on the farm, or to fight Indian raids, but now failure to get an education is a huge red flag.