I like the general idea of this, but this feels like it is trying to do too much. Removing ads, trackers, and unnecessary widgets is mostly a solved problem using unlock origin (+ possibly privacy badger).

I think it is a step too far to try and completely remove the step of actually visiting the website you get content from. This is the same thing Google is trying to do with their AI summarizer in search. Is the expected endgame of this that all useful websites just shut down because no one but bots visits them anymore? Even if those sites are user-funded and not reliant on ads, I find it hard to believe that many people would use AI summaries from the site then subsequently donate to financially support it.

I'm much more in favor of an approach that involves still visiting the actual website, but removes the content that the user does not want to see (ublock origin style).

I would suggest that once the browser extension exists, that it should transform the site "in-place" after visiting the site then pressing a button on the extension. And I could see that potentially having value (but I suspect this would take a lot of work to get right).