Why is that premise flawed? That's precisely what happens on mobile platforms. At least on desktops we recognize the absurdity of installing an app for every Web page we want to use
Better navigation and offline viewing might make sense if I really want to read the New York Times specifically, but that probably isn't the case if I'm getting there by way of a search engine.
The kind of web pages that people install as apps are made significantly worst by amp - like reddit is unuseable monstrosity with amp.