Be more selfish: wear a mask

What should we think of people who refuse to wear masks to stop the spread of the coronavirus?
Some pundits give an unequivocal answer: “Failure to wear a mask [is] an incredibly selfish act that puts other people’s lives at risk.” “Being against masks is a selfish personal choice that impacts others.” One even describes skeptical attitudes about masks (including President Trump’s) as a sign of a broader “cult of selfishness.”
Is refusing to wear a