Link?
While it's logical to discuss relative effectiveness of various means of pandemic mitigation, to claim that a defensive measure is completely useless is both a lie and stupid.
IMO, it's like telling someone a thin Kevlar vest isn't effective against large caliber rifle bullets. While true, to discard the vest is stupid because it still provides limited protection from shrapnel, ricochets, glancing rounds and smaller caliber rounds.
For God's sake Mr. Tiny Penis, your duckduckgo machine broken? Get woke!
https://www.linkedin.com/pulse/cdc-admits-cloth-masks-ineffective-armstrong-economics
https://www.kwtx.com/2022/01/08/health-experts-warn-cloth-masks-are-ineffective-against-covid-19/