And how do you decide what job? I've changed jobs and fields so often, there is no way you can prepare for that. Yet all the education I got has been instrumental in being able to adjust, evolve and assimilate new knowledge.
"I've changed jobs and fields so often, there is no way you can prepare for that."
I'm a grad student in English lit, and I tell my students that their wisest course of action is to study math and reading/writing. Those two skills are applicable to almost any other domain, make picking up other skills easier, and relatively few people really understand either.
Unfortunately, that seems to be the one thing that colleges and universities are phasing out of their cirricula in favor of Java, consulting, and how to pull all-nighters.
While you make good points, it's probably a good idea to decide on and prepare for your first job. Stick to it for 2 years and you'll be in a much better position to change fields.
Plus if you decide early you can then pay attention to make sure it's a good match for you.