I agree. It may be irrelevant to your life now, because you don’t speak Japanese yet. But if you speak with Japanese people, consume Japanese media, travel in Japan, these vocabs suddenly become very relevant.
Good news is, that’s fairly in line with what the original poster wrote:
As for consuming Japanese media, it then comes down to how wide a breadth of genre and content type one will consume, which is what I think they were to convey.