I completely disagree with Charlie Profit. There is a place for CSB.
In a previous life I was a PD of a couple of small market stations in upstate NY. I hired several CSB graduates because of their CSB experience. They understood they'd be working for no money and the worst hours, but they did know how to take meter readings (requried at that time), which end of the microphone you spoke into and had some vague concept of how the business worked (that the commercials paid the bills) we hired them. They were are good choice from the applicants that consisted of the high schoolers who split their time between us and McDonald's and the local radio gypsies who managed to work at (and get fired from) every station in a 75 mile radius for a variety of reasons. Some of them had potential and begain to rise .. others did not and eventually found their way into something more suitable for their skills.
This was 25 years ago, and there are not nearly as many of those jobs left, but some of them are still out there, provided you're willing to live in places you've never heard of with a population less than your HS graduation class. A little experience is better than none. As long as you understand it's an entry-level job in a small market and that you're going to get the worst shifts and jobs on the planet CSB can help you. If you expect to step into NYC radio there is really nobody that can help you.
Today, nobody is willing or able to invest time to train people. Any training at all is a plus over others who have none.