I don't disagree that young people (at least in the US) are told a lie like "Do what you love and the money will follow." I fell for that and tried to become research scientist, getting a far as receiving a PhD only to find that the funnel from there to a tenured research job was _extremely_ narrow. That's a giant waste of many motivated people's time. And it does need to be fixed.
But is the source of all this Richard Scarry books? I really doubt it. It's okay to give a rosy view of the world to children. Childhood is the longest and best vacation you'll ever take. But there does need to be an incrementally higher dose of "real talk" as children grow into young adults.