I wish wikipedia would be better compartmentalized, with articles tagged for their academic importance, because it makes it very difficult to download and/or ho

I wish wikipedia would be better compartmentalized, with articles tagged for their academic importance, because it makes it very difficult to download and/or host wikipedia when it includes a lot of noise, like celebrities, tv shows, local events, etc. I guess that's what wikipedia portals are for? For example I would love to be able to download a wikipedia archive just for math, computer science or history, etc, just like subject are found in an university, library or the dewey or congress classification. Of course it's a lot of work, but I really feels it's important and it would make wikipedia more accessible and attractive, and also cheaper to distribute.