I wear a face mask in appropriate circumstances because it is required by law here, and if you are legally required to do so, you should too, and you should not break the law under any circumstances. However, your mind should remain free to critically examine these sorts of public policies, because that is what a democracy, unlike a technocrat dictatorship, is all about. So, keep legal, always, but keep thinking too.
I do not claim that the following material is necessarily correct, only that these sorts of claims are part of the international debate occurring about Covid-19 face masks, and we should be aware of what is being debated. Otherwise we are just in an intellectual backwater.