Pisa, Whitehall and Ofsted are obsessed with maths not because algebra is the key to happiness, or geometry to great riches, but because it is easy to score globally. Bereft of an ideal of a good education, government, and especially central government, likes anything that yields mass data. It holds the key to control, to the regime of rewards and penalties that underpins modern administration and its funding.
I have never felt comfortable with exams. When I chose my.classes at university, I actually avoided any class that had an exam. I like to let my ideas grow more.organically.