Well, this goes even deeper.
Historically, the Web started out as hypertext: static text documents which were interlinked. But right off the bat, there was this drive to create "Rich Web Applications": the browser as an alternate to applications which you don't need to install on a "gatekept" operating system (Windows and OSX).
Flash, Silverlight, Java Web Applets,... All those browser plugins were exactly meant to achieve this. But none of them quite fully lived up to the potential of the idea.
There's a good reason why Microsoft in the 90's wanted to dominate the browser market: because it was a potential threat to lose control over what users could or couldn't do with their computers.
Things changed when mobile devices landed, and Google jumped into the browser market. Suddenly, building a web experience no longer wasn't as "trivial" as making sure your CSS worked on Explorer, Safari and Firefox.
At the same time, the "Application Wars" moved into the mobile realm where there was this battle between "native applications" and "web based applications". The latter was the notion that you could get the same functionality without having to install an app from an app store on your device.
Those dynamics of competition were - and still are - a driving force behind innovation that made browser engines ever more powerful and complex.
"Front-end" as a dedicate discipline didn't truly exist before the 2010's. You were a web master, a web developer, a web designer or something of the sort. But as soon as that complexity did hit, "front end engineering" became a specialization. Where it is really a cottage industry build on top of those complex browser engines, API's and sprawling specifications. For better or worse.
> However, the vast majority of sites are totally fine as static pages, as long as the user has a fast connection that makes loading between pages imperceptible.
Exactly. And that's still a completely valid use case.
The problem is how the industry has shoehorned an entire generation of front-end developers into believing that you need all those gizmo's to write HTML, CSS and JS.
When you're a budding front-end engineer and you land your first job from your internship, you're not even going to question the tools used by your employer. You're just going to use them because all you see is a big black box of complexity and nobody explains the history that has created that box.
I think that's why people will, like the author, ultimately drop out. When writing code for a living turns into this obligatory, rote exercise of juggling this mass of dependencies and complexity, with little to no time or authority to question why they need all this in the first place.