First, Dr. Risch's colleagues never weighed in after he wrote his research paper in which he debunked their false claims.
Second, it is not a "failed" treatment. EVERY trial showing it didn't work was not conducted the way it is supposed to be used. I really don't know why you have such a hard time understanding this.
Third, I accept the results of the Massachusetts mask data as accurate, but you have yet to even offer any opinion on why the two counties in Georgia had no differences, the two different schools my kids go to (one required masks, one didn't) had no differences, and the entire state of South Carolina has zero differences between schools that masked and schools that didn't. Funny you won't even address that.