WHY NO ONE ADD CATEGORIES TO PAGES?

WHY? Proof: Special:Insights/uncategorizedpages <-link
Category:Blablablah
Category:Why
Category:Whyy
Category:Why?
Category:Whyy?
Category:Whyyy
Category:Whyyy?
Category:Ahhhhh
Category:Aaaaaa
Category:Me 2 i confusion
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Category:Chaos
Category:I'm adding categories to pages now l ol
Category:Screams