I think that used to be the case, but with the complex application type websites you get today (think google docs, for example) javascript is required as a primary skill. Google has developed a new language called Dart as a replacement to javascript but many of their sites depend heavily on javascript to create the rich user interface required. You can get away with not knowing javascript, using things like GWT (Google Web Toolkit) which allows you to develop your web application using java and GWT then creates the necessary javascript from that. But of course the people who develop GWT itself must be highly skilled in javascript.Scripting languages are generally seen as supplementary skills anyway. Nobody (at least that I'm aware of) is hired as a JS expert, but rather as a developer who might have experience in writing JS scripts.
But you are correct that the demand for javascript developers is not very high at the moment...