I think you are missing where the author is coming from.
People knew how to use websites and applications in the early 2000s as well, but with the advent of home computers, WWW and smartphones there was a widespread belief that, by nature of being surrounded by tech, young people would automatically learn how it worked under the surface and possess an inherent fluency in IT.
That didn't happen. It's still people interested in tech actually learning the tech and your average high schooler doesn't graduate able to write drivers, create software or hand-code websites and web servers.
It was a belief in the coming of a tech-utopia where every young person would know those things. But it doesn't just come automatically. There has been a huge surge in usage, driven by increased accessibility, standardization and user interfaces that don't require prior knowledge.
A lot of the older generation (probably mostly the less tech savvy ones) still believe we are getting there and have at least somewhat gotten there. We really haven't.