ASP.Net MVC与HTML + KnockoutJS + WebAPI

I'm wondering why not just have static HTML files in an ASP.Net MVC 4 Web Project that use jQuery+jQuery Templates+KnockoutJS combination consuming REST based (ASP.Net MVC 4 WEB API hosted on Azure & secured using ACS). The Web API can use Entity Framework and return JSON serialized objects that can be retrieved using $.ajax() and bound using KnockoutJS.I'm wondering why not just have static HTML fil