I'm thinking more at the high school level, but I think you are correct.
In the United States the kind of job you can get is strongly correlated with the college you graduate from and to a lesser extend your college grades, so high school students (especially before they determine what college they will go to) face enormous uncertainty over their future job market value.
Some quick background, I am putting together a non-profit whose goal is to provide objective, rational career guidance to high school/college students, with the aim to solve what I see as a pretty big problem in the American educational system: our current career guidance is more focused on how to get a job on your chosen field, rather than what field should you choose in the first place?
Mid-ranged goals involve setting up programs where students can "shadow" people who work in a field they are interested in so that they can see what those types of jobs actually entail. Short-term, the goal is to put together some informational resources that students can use to help guide their decision a little more rationally.
One of these information resources is a database that uses data pulled from the Bureau of Labor and Statistics, to tell you