I have come to the conclusion that you can only benefit form being taught what you have already worked out for yourself.
Whether you want to become a preschool worker or a dance caller (my part time jobs) any course you take has to go side by side with 'work experience'. If you haven't seen the problems, you can't appreciate the solution. (ok exageration)
Folk is such a wide subject, and people come to it from such differing backgrounds. Your syllabus would be full of simplifications or omisions.
Who would take the exams anyway?
The fact that the 'Gusto' programme didn't get off the ground shows that people are too busy 'doing'. Though we turn up at workshops as part of festivals (if there's a callers workshop I go to it, the singers must go to the workshops at Chippenham else they wouldn't keep putting them on). I suppose we learn from each other - what to do and what to avoid. Those interested buy the books, listen to others, ask questions on Mudcat.