Earlier quoted context omitted.
To be honest, we still don't really know if masks work. They look like they probably do something, but the evidence is weak and the effect size small. It's totally worth it to bend an exponential function. But the individual benefit from mask wearing in any given interaction is negligible.
Part of the problem is that the American media spread misinformation about the effectiveness of masks for political gain. For example, I remember the New York Times pushing the idea that vaccines would be less effective than mask wearing even though all evidence suggested that even a vaccine which met the minimum standards for approval would likely be substantially more effective than mask wearing, seemingly because…
In this case, the combination of masks and vaccines might have been required for a long time.
(hacker news analogy: "just in case Rust doesn't remove all defects, we are still going to need to debug"