Hi Jonathan,
a really passionate and convincing essay, If we had been asked to name one thing that would make the world a better place 'play' is not what would have come immediately to my mind but may be it should.
There can be a problem with expecting children learn through personal exploration because sometimes they just don't get what they are being expected to do.Some personalities thrive on the freedom, others are afraid of doing something wrong or just plain do not know what to do. Speaking from personal memory. Teachers need to facilitate the learning of the children by giving some physical input or suggestions to get the play/learning going if it isn't spontaneous.
Giving scientific achievement recognition on par with music and sports entertainers sounds nice but the really high earners are just the tip of the ice burg. There is a joke that goes; do you know the difference between a musician and a pizza? A pizza can feed a family of 4.
Really enjoyed reading your essay, its packed with sensible suggestions. I do hope the world become that wonderful, playful, inovative, knowledge and life long learning valuing future you have presented to us. Good luck, Georgina