That's if you're making an application, sure, but on the web I view all sorts of sites and most of them are just styled text containers, maybe with an optional way to mutate things. HN, Reddit, News, recipes, forums, galleries, these are things I regularly consume that don't need APIs to return content. For applications, like Facebook, it's understandable, but if you don't spend all of your time in Social Media, then you probably are not really using an application.
On mobile I just use a client that requests data from the API and renders it for me. On desktop, yes, for now, but I'm in the process of writing views that load faster and don't require a browser.
