I’m biased. As Mulder did, I want to believe. Except, I want to believe that being a generalist can work. And that’s what “Range” [affiliate link] by David Epstein, claims. It’s subtitle is, “How generalists triumph in a specialised world.”
It’s not a challenging read. There is a lot of anecdata, examples of people who took a broad path and still succeeded. In that sense, maybe it’s like “Quiet,” which is about introverts. It doesn’t tell you how to succeed, only that it’s possible and that you’re not alone. Maybe that’s enough?