The Web is meant to have links and interactive content and be navigated, sure.

But to expect every author also upload a PDF? I mean, TeX is great for what it is, but there's a reason _the web_ adapted print stylesheets.

Even if (La)TeX (or Typst, or Postscript or anything else) were easy to learn, you're left with maintaining 2 copies or a compilation system which is also a challenge.