Loved the post. Just to add to the principal observation about the vocab point — One thing I’ve noticed is that experts who can communicate/teach well are very effective at getting you to the vocab point (to the extent possible without experience) quickly! And once you reach the vocab point, the field is legible enough that you have the means to organize deliberate practice and interpret experience (if you want to go towards mastery) or delegate details (if you don’t need them). I wonder if this provokes any more thoughts from you.
I'm glad you were able to articulate this idea so clearly. I think similar advice which maybe isn't so clear is to try to avoid "being the smartest person in the room".
On the topic, I'm reminded of coworkers talking about the most recent Super Bowl (I think, I don't follow sports) which included commentary from players who played as quarterbacks in the same season. One of the things my coworkers mentioned was how interesting it was to hear them talk about the game because they used unfamiliar terms.