why are so many people going to school, only to find that they don't have the job?

I don't know if your location permits this, but try to get inside a Swift terminal drivers' lounge and actually talk with the students camped out in the lounge and ask what they think. I bet you it's a bit different than what the recruiter said or the trucking school rep said. Be a detective to get the real story. There's a lot of info on these forums too.