Celebrity teaching such as Masterclass reminds me of unsubstantiated self-help teaching promises. It's all about marketing, about luring customers with supposedly easy-to-achieve results such as "Rewire your brain in 7 days" or "Learn how grand master chess players think in 12 easy lessons". Or - God forbid - "Teach yourself expert Go/Rust/Python/C++ programming in 21 days".

Problem is: It is never easy to achieve a high level, at anything.

And that in turn leads one to Peter Norvig's (posted here many times) excellent Teach Yourself Programming in Ten Years blog post https://norvig.com/21-days.html