Broad filters often sweep up anything music-related to save bandwidth or ensure productivity.
If you meant this as a feature request for a specific app or site, could you clarify which platform you're asking about? I can give a more tailored answer.
Some lyrics are region-locked due to licensing. An unblocked feature might fetch the lyrics from an international server or alternate source not subject to the same restrictions.
Paste the URL into Archive.org to see a saved version of the lyrics. Alternative Platforms for Lyrics