The GP's point is more general and stands. Technologists inevitably start off "in the middle" of a stack of technologies, and then choose to dig down and/or build up from there. It is inevitable that newcomers will not understand the technologies upon which their current work rests. A certain fraction of those will become fascinated and drawn to understand the underpinnings of their work, for an edge, or for the love of it, or both.
This process happens more naturally over time if you grow with the technology. For example, if you started programming with HTML in 1995 you not only have ~30 years of experience, but you've also seen the changes as they occurred, and have a great deal of context about the how and why each of them happened. That kind of experience can only happen in real-time, unless some kind soul is willing to write a manual to help newcomers speed-run it. Such a manual is often called a "textbook".
This process happens more naturally over time if you grow with the technology. For example, if you started programming with HTML in 1995 you not only have ~30 years of experience, but you've also seen the changes as they occurred, and have a great deal of context about the how and why each of them happened. That kind of experience can only happen in real-time, unless some kind soul is willing to write a manual to help newcomers speed-run it. Such a manual is often called a "textbook".