I believe these guys tell the story about their own experience and perspective, and it cannot always be applied to other circumstances. It's like what Steve Jobs said about connecting the dots: "You can't connect the dots looking forward, you can only connect them looking backward." But sure, there are always common financial theories in these books with some storytelling to make them more appealing. If you have already read college books about finance, there's little value other than good stories, and probably some aha moment where you understand this theory can be applied in that situation.
That said, always go with the basic knowledge about risk, portfolio, etc. then you can pick any complementary books you want. I'd rather follow some crypto news/influencers to get some updated things since you said yourself that it's "fast-changing," meaning if it's already in the book format, you'll hardly get any fresh updates.
This is true, making it more complicated is a tough thing and if you are making it more complicated then you are going to end up not understanding it at all. What we are doing by making it simpler is the way to grow and if we could make some money with this method then we are going to eventually realize that simpler ways is better.
Thinking about the oldest method of making money, they are going to tell you that we are going to make the most money by just holding bitcoin and there is really nothing simpler than that because all you do is accumulate bitcoin and hold it and eventually you make some money. This is why you can't grow further and that is why the best path is simpler tactics and if you have a feel to make it simpler then you should be making it simpler without a doubt.