Walden is making a crass, divisive speech.
With a divisive effect.
His speech is full of what are in effect class assumptions.
With a class-based effect.
He could have talked about the value of the 'immeasurables' in a wider curriculum across education of all sectors - as a pedagogical matter, rather than a sector or class based matter.
He could have urged all teachers as professionals to provide the narrative that will support a GCSE curriculum (important to all sectors, all young people) which is rich in quality, research, evaluation by students, rather than tick box type answers in which they simply regurgitate.
But he didn't.
Therefore he us a charlatan, using sleazy nasty techniques to try and scare custom his way.
Hopefully good teachers, amongst his member schools and in the state sector, will show better leadership than him in the way they come together to share practice and lobby for a good education overall.