But I don't agree that "the precautionary principle" is sufficient justification for a government mandate. Clear evidence should be required to impose the mandate.
And my previous post was not agreeing with you; it implied that masks may work or may make things worse by trapping more virus particles inside the mask.
Another post here linked to a study that showed that certain kinds of masks can sometimes be worse than no mask, even ignoring the "trapping" factor, by actually increasing the droplet count in the air.
It is in many other realms. Why raise the bar for this?
This whole thing feels like whatever the equivalent is of "virtue signalling". Why have some groups decided to be so stubborn about this particular thing? It smacks of some identity thing.
Which is fine when the public demonstration of a point of principle isn't as important as the thing itself. Otherwise it's a collective act of cutting of one's nose to spite one's face.
But maybe this is the part that is somewhat US specific. The relationship of the people to the government seems to have an almost mythic role in political identity - rather than a somewhat more pragmatic one that I recognize in the UK.
The debate is whether they help by 0.001%, 99% or some number inbetween.
And until there's strong evidence then we're back to the precautionary principle (or as I like to put it "just shut-up and where your damn mask")