Exactly, I don't see much point in learning obscure things for the sake of learning obscure things. If one has an interest in the medical field, for example, then learning words like 脳脊髄液 and 髄膜 are important, but otherwise knowing the kanji "髄" doesn't really have much practical use.
There's already been discussions on the amount of words before, so I don't want to get too much into that, but I still stand by my position that 10,000 is only a drop in the bucket for Japanese. Learner's dictionaries of 50,000 words don't even have a lot of words that I would consider pretty common and important for literature and other fields. It's been quite a while since I remember seeing research on the estimated vocabulary size of the different age/education levels, but if I remember correctly 10,000 is still only about the vocabulary of a child in elementary school.
There's already been discussions on the amount of words before, so I don't want to get too much into that, but I still stand by my position that 10,000 is only a drop in the bucket for Japanese. Learner's dictionaries of 50,000 words don't even have a lot of words that I would consider pretty common and important for literature and other fields. It's been quite a while since I remember seeing research on the estimated vocabulary size of the different age/education levels, but if I remember correctly 10,000 is still only about the vocabulary of a child in elementary school.