Like nearly everything in education, this is woo. We have almost no evidence for any intervention, even in mainstream approaches to schooling. We still largely hold to the absurd idea that if a school environment is intuitively appealing, it will be effective in providing a lasting benefit to the pupil. This is of course a baseless irrational belief.

Education does not need more opinionated "humanitarians". It needs randomised controlled trials, and lots of them.