If anything, web development is far more arcane and challenging now. No one just writes HTML, CSS or JS in a text editor anymore, the bare minimum expectation is to use complex frontend frameworks and NPM and compile everything from other languages. Compared to the sprawling, byzantine nightmare of modern web development, JQuery plugins were a breeze.

I think, it's simply the case that the web has matured, and more people are concerned with content than the superficiality of quirky presentation nowadays. Just as it's possible for an author to publish a book without knowing typesetting or running their own press, one can publish to the internet without knowing even the basics of HTML, CSS or JS.

And of course the web has coalesced around a set of standard layouts and visual language, as any media paradigm inevitably does, mostly because it has done so around a few standard frameworks. But then let's be honest, most Geocities sites kind of looked the same, too.