Not really. What's being suggested is that what's being tested is both societal compliance combined with mask effectiveness. To dramatically over simplify, let'

Not really. What's being suggested is that what's being tested is both societal compliance combined with mask effectiveness. To dramatically over simplify, let's assume we have a population of 10, none of them mask wearers. Let's also assume masks are 100% effective at preventing Covid infection. These measures convince only 1 person to wear a mask. In the control group (no advocacy) 10/10 are infected. In the study group 9/10 are because that one person wore a mask. So we've got an effectiveness of 10%, despite masks in our contrived example being 100% effective. The effectiveness is blunted by lack of compliance.