On the contrary, I think it hurts when I don't/am not able to learn a new programming language. It may be because of the lack of time or some other reasons. As far as I see, programmers/software developers are in love of challenging the languages, putting better things/products, and when you see that you are doing same thing always, you don't feel good. So you want a new challenge, a new language, something new to learn and put more products by it.

So I think it gives me excitement to follow new languages, new libraries, new approaches, new technologies. But I don't have time to get all of them, and people may not be able to go enough deep always. So it hurts not to learn more; but doesn't not hurt to learn more.