A lot of it is due to students being told to simply pursue what they enjoy. Take university courses for example, the no.1 most common advice I've heard/seen given out to students, is to pick what they enjoy most. I think a lot of students end up taking this advice too literally, leading them with the belief that they shouldn't settle for anything else other than what they enjoy most.
One particular line from that article sums it up best for me, ''large numbers will be aiming for jobs that are in short supply'' - it reminds you of the problem in courses like: law, english lit, history, philosophy, basically the arts and humanities (and social sciences as well). There are so many people who pursue these courses having only factored in their personal interests without much thought about the jobs market, and who can blame them? They've been told to take this idealistic approach by virtually everyone.
A bit of realism is needed. Although harsh, kids should be reminded that inspite of their thriving passion for journalism and what not, the jobs market is like a game of musical chairs, often there are more people wanting to go into an area than there are jobs available in it, so a lot of people do get left out. But from a teacher's perspective, it is a bit of a catch-22 situation, you want kids to believe in themselves and succeed, so you don't want to put them off.