The idea is that JavaScript allows a relatively safe way to do that in a sandboxed environment (the browser) that is available on almost every computer.
The developers who really want the web to just be a bunch of static HTML are actually inhibiting that vision of a web platform. Because if disabling JavaScript were to become popular, that takes away that capability of web browsers to run applications. The conversation would go from something like "we can use JavaScript and this application will run for anyone who has a new version of Firefox, Chrome, or IE10/11, or Safari" to "we can deploy our application to the latest browsers, but we will have to first present a screen asking users to enable JavaScript on our site" or something along those lines. It goes from being a ubiquitous cross-platform solution to one that will only run for people who like JavaScript.
JavaScript in the browser is by far the best option we have now and in the foreseeable future for easily deploying applications across different types of operating systems and even devices.
Its amazing to me how many people don't appreciate that goal or really take it into account.