"It seems that every time I look at a "fact check" for just about anything, what I find is lazy, illogical, half-assed reasoning..."

Sean Malone
"...In this case, they acknowledge that the literal claim is true - that the box of masks in the photo explicitly warns that it does not protect against covid. 

But then they respond to a strawman (ie. not the claim being made in the OP) and explain that the mask isn't to protect the wearer but to protect other people *from* the wearer, even if that individual is not symptomatic.
Their primary source for this?
An op-ed some guy wrote in May of 2020 advocating mask mandates...Read all!

POLITIFACT.COM

PolitiFact - Mask box label is legitimate, but people are misinterpreting it

Online rumors continue to claim that different face masks are ineffective in protecting against th