//As NJ has pointed out repeatedly on here//
I have to say, naiit, that NJ has never said that [that masks are useless]. My criticism of their use has been twofold:
Firstly, medical authorities (principally the WHO) were not in support of their general use among the public at the start of the pandemic. This changed when it became apparent that many governments were in favour of their people wearing face coverings. This was, in my view, because governments believed it gave their people “confidence” rather than necessarily protected them from anything, but that is another debate. When the WHO did finally provide its support for their use, that support was, at best, ambivalent. I’ve read their advice and that’s the best than can be said of it.
Secondly, any advice to use face coverings has been predicated on the notion that they will be used properly, with all the recommended precautions taken. I know of nobody who follows those recommendations fully. Most don't even get close. More than that, the risk of self-contamination, whist mentioned in the WHO advice document, is simply glossed over almost in passing. In fact, especially when used improperly as they invariably are, that risk is considerable but has never been emphasised.
Face coverings have been presented as “a good thing” and it has been seen as heresy to suggest otherwise. They are not necessarily a good thing, especially if they are wrongly used. I don’t really care that there is no room for my opinion or whether others like it as I make my own mind up about these things rather than sheepishly following government mantra. I don’t rely on the government to keep me and mine safe. In fact they are the very last bunch I would trust with my wellbeing.
// NJ is not always right just because he pretends he's a real judge.//
I have to say (once again) that NJ has never pretended any such thing.
// It's not difficult or very costly to have a selection of clean, hygienic masks available for use.//
No it isn’t. But the overwhelming majority of people do not manage it.