As an inquisitive young person, you are, quite likely, at some point confronted with something that seems like magic.
If you're truly (or perhaps excessively?) inquisitive, you try to dissect that magic. Sometimes that leads to true understanding, sometimes just to confusion, or at best the understanding that you don't understand.
The "home computers" of the 1980s were still simple enough to allow "true understanding". But only up to some point: I could find my way around a ZX Spectrum memory map just fine, but could I have built such a machine from scratch? No way!
In hindsight, I only understood a very small portion of the technology I was working with, even though that understanding was absolutely mindblowing at the time. Today, that portion would very likely have been "higher up the stack": let's say, I would be an absolute master of the DOM using Javascript, instead of a master of the ZX Spectrum ROM using Z80 assembly.
But would that portion be less "worthy" or less useful? I'm not so sure...
But maybe I'm reading too much into their post.
I'm a dev of 12 years who cut my teeth on assembly and c, i currently write "modern" js and I feel this way, if it's far too complicated for me, it's going to be even worse for a newbie