Yes I agree - this sounds exactly like what you get from e.g. a master class in music. There's no promise that the person you watch is any good at teaching, but they're gonna be pretty good at doing the thing.
A master class isn't supposed to give you foundational or comprehensive knowledge about a thing. A master class is supposed to
a) give you some random-ish insights from an expert
b) be marketing for the expert
You don't go into a masterclass not knowing how to do XYZ and then leave knowing how to do it. You go into a masterclass with a fairly good base knowledge of XYZ, and then leave knowing a few neat expert-level details about a particular subset of XYZ, but without any practice on actually doing it yourself (unless you're the demo student, but in that case you're probably also nearly an expert yourself).
