Which is like saying that if you read enough textbooks you'll become an engineer/physicist/ballerina/whatever.

A huge number of people in academia believe so. The entire self-help literary genre is based upon this concept.

In reality, and with my biases as self-taught person, experience is crucial. Learning on the field. 10,000 hours of practice. Something LLMs are not very good at. You train them a priori, then it's a relatively static product compared to how human brains operate and self-adjust.