Is there a reason such specific tags in existence? I don't think anyone would try to check "Jedi" and "Sith" tags over "star-wars"..
While I generally dislike over-normalization, or over-tagging, there are valid uses of the tags.
The tags should be used to help specify or categorize the question. A question about the titles and ranks within the Jedi Order makes sense to be tagged with "Jedi". A question about a doctrine specific to the Sith makes sense to be tagged with "Sith".
Will anyone try to check "Jedi" or "Sith" over "Star Wars"? No, probably not. The same case could probably be made for a lot of tags which might be grouped within hierarchical tags (which we'll likely never get).