If a JS web site also provides you with a clean API to the actual raw content in a format that is even easier to consume than HTML (e.g. JSON), would that make you happy?
Sure. But i'd rather not discuss ridiculous things which will never happen.
I don't want an API interface to a web page. I want the web page. More specifically, I want the content; I could give a crap about markup if my application is not a web browser of some kind. There's probably a thousand different uses of applications that just get content from web pages and none of them try to deduce an API to call to get an idea of what a webpage's content was supposed to be. They just expect that, you know, when querying a webpage they're going to get the webpage, and not some cryptic scripting.
I should not have to reverse engineer a webpage or read an API spec in order to wget it. This is ridiculous.