This article has been re-written for over a decade.
The so-called "complexity" is just a list of tools that each solve a specific problem.
Tooling isn't the problem: The complexity is inherent to modern web development. You see similar "hidden" complexity in other frameworks like ASP.NET, and GUI desktop frameworks as well.
If you're using Rails as an API backend with React handling the frontend, it's almost a completely different application architecture than a traditional Rails monolith. So the list of tools (Vite, React, Prettier, etc..) is almost for a completely different problem (again, unless you use Rails for FE; if you want to use Rails for Frontend, use Rails for Frontend; not a fan of the mash-up at all.)
The real issue is learning methodology:
A lot of developers today start their careers with frameworks (point 4) before learning the fundamentals of the web (points 1-3).
HTML for markup.
CSS for styling.
Learning server-side logic (e.g.: can POST and can return a completely different page at the same URL) and databases for dynamic content.
Then, JavaScript for interactivity.
Embrace the tools: Each tool on the list (Vite, Tailwind, etc.) exists for a reason, and they're all necessary for a modern web application.
Saying there are "too many" is an amateur take on the reality of the ecosystem.