I don't have anything more to add here other than that I don't really consider the Platonic Session to be a critical tool - I think I'm largely the only designer to actively use this lens and plenty of great games are being made without a cohesive and singular vision. It's just something vital to my own personal work process and something I think many designers would benefit from is all.
Otherwise I think we might be at a bit of an endpoint here. Thank you for the discussion! It's forced me to rethink a lot of the specifics behind the idea and the way I present it, I really appreciate your viewpoint.