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.

When I was a kid I was running websites with active forums and a real domain name, and I did it with vBulletin and my brain. Someone bought the domain name and website off of me, haven't touched web tech since. I did use Wt at an old job once, but the "website" was local to 1 machine and there were no security concerns.