It would force you to write a more descriptive name. Maybe we want to hide by community title and not the handle though.

Say you want to have a community for memes. It is terrible UX if you just see seven different “memes@domainname.ending” in the result. So with an opinionated search, you instead name your community Sopuli Memes, Solarpunk Memes, Programming Memes etc., or just Funny Memes Archive, and they would not be hidden.