Perhaps you're taking the npm/react/vercel world to be the entire web? I agree that that stuff is a scourge. But you can still just write html and Javascript and serve it from a static site, I wrote an outline in https://incoherency.co.uk/blog/stories/web-programs.html which I frequently link to coding agents when they are going astray.

I envy your pure soul. I am one of many who has had, at times, been coerced through financial strain to write some front end code. All I ask for is, when the time comes, you try to remember me for who I was and not the thing I became.