Because they care:
San Francisco’s Bay Area Rapid Transit system is reinstating a face-mask mandate for riders, making it the only big transit system in the region to do so, as it moves to protect at-risk individuals including children.
If face masks had worked, this would make sense. But with a majority of everyone in the country now having had Covid-19 – inspite of mandatory restrictions and face masks for some of us for nearly two years – cases continued to explode.
The public health quacks have no consistent, non-contradictory, coherent explanation for why masks work in their imagination but failed to work in the real world.
Public health no longer has any credibility or trust remaining.