Feels like one of us is misunderstanding something. Electron lets you run any web technology - so when users open your app, they are greeted with whatever you can show on a webpage.
You can also have Electron run in the background as a server if that's something you're into ;)
Whereas if you build starting from Node.js (or Deno I assume) you can skip the Chromium part. Instead of packaging Chromium with your app you assume that users have a browser and can use that to talk to your app.
The benefit of using Node.js is you don't have to use a different language for the backend. It helps.
BTW. "Electrino" in the linked-to article seems interesting too.
If you have to write a front end (website) that works with more browsers, you have to put in moro work.