Any real education is incapable of robust and widely accepted psychometric assessment that will satisfy professional regulators.
Another formulation: if you can reliably assess education within a standardised and regulated framework it is not real education.
Medicine: we do two things; educate and train. It may be possible to pull them apart, and we can assess and measure training simply (simply, in theory at least, if not at a certain cost in practice). Education is harder, and is something you can only meaningfully assess 10 or more years after graduation. Students will not be able to fully value and asses their education until a long time after graduation.