I think what is important here is that the degree gives the potential for a certain career field - but does not guarantee a job in that field (and does not mean you are stuck in that field if you later decide you hate it).

One thing you might consider is that relevant work experience goes just as far for getting on a trajectory as the education. Trying to be hired as a teacher might be just as hard with an education degree if all you've done is worked on oil rigs as it would be if you had worked in a childrens museum for five years but had no formal degree.