[M T]

The lack of efficacy of masks in this society could be due to risk compensation.  The people who wear masks may feel more protected so go outside their home more often.

Good point.  It can also be that those that HAVE to go out among others (and so are at more risk) are more likely to wear masks.  For instance, an EMT probably spends more time in masks but is also at greater risk.

[M T]

The lack of efficacy of masks in this society could be due to risk compensation.  The people who wear masks may feel more protected so go outside their home more often.

Good point.  It can also be that those that HAVE to go out among others (and so are at more risk) are more likely to wear masks.  For instance, an EMT probably spends more time in masks but is also at greater risk.