I run all of my browsers (including mobile) with all 3rd party scripts blocked by default. Most sites that you care to casually consume will work without issue. Anything that uses a payment provider or google to login needs 2 greylist rules (which are mind-numbingly simple to click on once).

I can set it up for people that don't understand what they are doing (and I have) and they will not notice anything in almost every case.

As such, I conclude that this generalisation is grossly overstated and you probably haven't tried it to see if what you are saying is correct.

Well, it's feasible if you fork the web instead. If a significant number of people want draconian measures to be taken, and they converge on a search engine that can exclude the non-compliant, then the new standards have a chance of catching on.

Suppose I say I just want to eliminate javascript entirely - that's not feasible to enforce, but if I could just search the non-javascript pages out there, then a new way of doing things can be bootstrapped.

Uhm, external analytics is exactly what we're trying to break here. And if you need an external API, have whoever is serving the Intranet page load that - that's how it's been forever. Websites loading data through JS from 20+ endpoints on a single page is very much a recent disease.