Clearly, you missed this:

> High levels of community masking, including both source patients and exposed people, have been associated with reductions in infections ranging from 10% to 80%, with more protection when there is consistent mask-wearing in high-risk areas such as households.

Not to mention the link in that paragraph, which references 18 studies supporting the effectiveness of masks: https://www.cdc.gov/coronavirus/2019-ncov/science/science-br...