That argument works well with the Star Trek wiki as example. I don't think it goes as well with the Minecraft wiki. Fan wikis like this are targeted at people

That argument works well with the Star Trek wiki as example. I don't think it goes as well with the Minecraft wiki. Fan wikis like this are targeted at people that already have a fairly good understanding of what the article is about. This allows them to ignore certain aspects and assume a lot of things are already known. In case of Wikipedia you have to assume much less prior knowledge and you have to start at the very beginning with each article. If you're already in the know, this gets boring very quickly. This means that there is always going to be a space for separate wikis that cover specialized topics in detail for a different audience.