Well, there does seem to be a special Silicon Valley version of this where people get incredibly wealthy from their software/web businesses and conclude all the

Well, there does seem to be a special Silicon Valley version of this where people get incredibly wealthy from their software/web businesses and conclude all they need to do is get into <some other radically-different field> and they'll get that "figured out" just as easily. It's a unique kind of hubris that doesn't usually pan out.