Yes, because there's no reason not to. A Wikipedia article (even a long one) is "narrowly and up-to-the-point concentrated" on a single concept. There maybe a lot to say about dogs, but https://en.wikipedia.org/wiki/Dog only covers things common to all of them, and individual dog breeds get their own pages (as does the concept of a "dog breed").

Similarly, SO has good, valid questions about general concepts, which are narrowly scoped about the concept despite the broad applicability of that concept. For example, https://stackoverflow.com/questions/26337003 .