exactly. And it applies generally in life too. esp. in "western" well-off places. i have met (okay, seen eyes of) ~12y old kids with probably "35y-old"-grade e

exactly. And it applies generally in life too. esp. in "western" well-off places. i have met (okay, seen eyes of) ~12y old kids with probably "35y-old"-grade experience behind... And i have met a few 38 or 43y old human exemplars that barely pass for 6-7-10y old at most. yeah, teaching is hard. You have to learn more than them, about them, in no time, in order to build the (different) bridge to everyone. Takes... time. And gumption.