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The article is about pollution: that's a cost.

Conformity over something that doesn't work: that's a cost.

Fear: that's a cost.

Not being able to relate to other human beings using our facial expressions the same way: that's a cost.

> Masks are effective at helping an infected wearer reduce spread to others. This is not exotic science

There is literally no Science to bake that up. It's literally superstition. BMJ Published research saying they're not effective:

Cambridge says they should only be used as a last resort:

and most recent was the 6,000 person study from Denmark which came to the same conclusion: they do not work.