I don't think we are discussing the same thing. I think this law is not impeding that. That what the argument is about. I don't think we're going to derail Science and destroy a generation of students, which is kind of what you're describing there.This is a failure of perspective on your part. While I could agree that, from a 1,000-mile-up perspective, "what we think" about just about anything is always sort of "tentative" - that is, absolute certainty about pretty much anything is unachievable, which does sort of put things in this weird "subjectivity limbo."
However, once you have entered an environment like a classroom and the objective is laid out for you (to learn and be able to reproduce the topics and applicable knowledge being passed on to you) then you have entered an OBJECTIVE space, within which you have an objective goal - no longer subjective. When the rules are known, you can't just flub and try to beg off when you bend the rules. In order to get a high grade, the rules are "get it right", where "right" is the applicable curriculum that the teacher taught you. This is basically how it has to work. Otherwise every class becomes more like kindergarten "art class" - and everyone just gets a "participation" grade. Who do you feel that sort of education actually helps?
Off topic I think our public school system works too much like a factory, churning through students who pass instead of requiring them to master things. It is failing many students. Part of this is because its not cost effective to insist upon lectures all day. Some students don't need lots of lecture time, and we could save a lot of money by letting them do self study. The school assumes, however, that lecture time is needed. Whats needed is that they study, perform a certain a mount of coursework and then pass examinations. Lectures were effective when school about reciting, and the students would recite together in order to remember things. They'd memorize piles of information that way, droning on with their group voices. That was a good factory method which worked, but then when school subjects become more individual and the process become internal we kept on keeping the students sitting in rows. We turned schools into baby sitting services, and they stopped efficiently teaching.