Sure. And if you ever write that guide, you're still going to borrow heavily from LW. And someone else, writing "how to use your musical talent rationally" or "how to pick your career rationally" or whatever, can so the same.

That is the true value of LW in my book - it presents useful ideas in a sufficiently abstract fashion to make them obviously applicable across a wide range of topics, and does so in a way a smart high school student can understand. Sure it sacrifices brevity in order to do so, and its lack of infographics and other multimodality is a huge drawback, and it spends time on topics most people won't care about, and I'm sure there are other valid concerns. But still, if you want to do better, LW isn't a competitor, it's a shoulder to stand on.