And it's rather a good thing, no? I mean, for me, as a developer who happens to know at least a dozen of languages quite well and has a basic grasp on a dozen more, I like it that way. Namely, I like being a harder to find good with limited supply, this means that I will be paid more.

Otherwise what would be the point of learning all these languages, frameworks, libs and environments? Of course the learning experience can "make you a better developer", but is it supposed to be only that?