I'd say a big part of the web is gaming, chatting, interacting. A lot of that content updates every few seconds. Without JS, websockets, ajax requests etc, do you suggest users load the entire page again whenever they want to see an updated view?!

Or is your opinion that it should only be possible to do those things in native, purpose-built apps? Because in that case, how do you justify using an operating system? Perhaps we should exclusively use purpose-built assembly code that you flash to some writable media every time you want to run a particular program!