There are actually a lot of reasons masks are not effective. Obviously they block particles but do they actually stop the spread of disease is the question, and the evidence there is extremely questionable. Besides the posters arguments and comparisons, there is the obvious question of why did we see this winter surge when all lockdowns and masks mandates were imposed and at their highest peak? If everyone is covering their mouth when they sneeze then or appropriately staying home when they get sick, would that be as effective as blocking particles, your hand or elbow is much better protection than masks as they are non permeable. Why is it that the supposed white right wing anti-maskers have the lowest death rate of any ethnicity? These are not easy questions to answer and I’m not saying they are all not able to be explained but the effectiveness of masks is very far from proven.