I don't think that's a problem, as long as exams are open. The problems would be a) blindspots among the self-taught, or b) largely useless, complex material ad

I don't think that's a problem, as long as exams are open. The problems would be a) blindspots among the self-taught, or b) largely useless, complex material added to the exam by the people who sell formal education in order to force people into formal education. edit: and only the second is a real problem, the first is a feature.