Good advice.
The issue, of course, is that we seldom have the luxury of this, unless we are willing to make sacrifices, or do a heck of a lot of extracurricular work.
In my own development, I never had the advantage of a fancy sheepskin, so I wasn't really paid that much, compared to a lot of folks, and my employers didn't have much of an issue, when it came to throwing me at experimental stuff. It wasn't much of a risk, for them.
Meant that I learned a lot. I was also given a disproportionate amount of architectural responsibility. I learned how to design systems, and complete stuff, early in my career.
But it also meant that I have spent my entire career, looking up a lot of noses. I've usually been a "n00b," in most of my endeavors, and geeks tend to treat neophytes pretty badly (maybe because of all the atomic wedgies we got in grade school?). It drove me to do a much higher-quality job than what might have been considered acceptable. I developed a "screw you, I'll show you" attitude, and I've habitually produced highly-polished work, from the very beginning[0].
Didn't always win me friends. No one likes it when the chav kid shows up the toffs (but the bosses liked it, and really, they were the ones that mattered).
I'd say that the humility taught by that treatment was as valuable as the book-larnin'. It forced me to solve my own problems, find information, develop a thick skin, and not rely on "magic answers from the sky." I was never able to throw the problem over the fence, so someone else could address it. I always had to clean up my own messes.
I also practiced a very good team ethic, with a great deal of kindness towards teammates that were struggling or being marginalized. I figured out how to support and mentor people without making it seem as if that was what I was doing (the trick is to lead by example). I used the cruelty that I experienced from other geeks, and from awful managers, as an antipattern, in my own dealings with others. I think it helped me to be a fairly good manager.
It's always a very good idea to help out folks that are not that high in the food chain. They are likely to return the favor, sooner or later, and they often have their fingers on the real pulse of things. They can be quite helpful.
It hasn't been that much fun, and I haven't lived high on the hog.
But I am pretty good at what I do, and, in this phase of my life, it's paid off in spades.
When I saw the title, and who wrote it, I said to myself "This should be fun."
[0] https://littlegreenviper.com/TF30194/TF30194-Manual-1987.pdf (Downloads a PDF of my first-ever engineering project)