There is a fundamental challenge here. If you want to learn X, you look for a teacher that is great at X and teaching. Teaching, writing, and other forms of communication are sort of meta-skills that you need to pair with some domain so that they have something to communicate.

The intersection of "great at X" and "great at explaining" is often very small. In practice, you end up having to make trade-offs like wading through poor exposition because the author is the real deal. Another common failure mode is what we see here: People that are so good at explaining, hustling, and branding, that they become popular despite likely having very little expertise at X.