This is just something that happens with masks. I think you're reading too much into it. In years past in Japan, where mask-wearing was always common, I notice

This is just something that happens with masks. I think you're reading too much into it. In years past in Japan, where mask-wearing was always common, I noticed that just covering the mouth and not the nose was quite common. It still covers most of what people are trying to cover (odor, droplets). Which would still help for the worst contributors to covid too. If people are feeling claustrophobic or legitimately having difficulty breathing, I think it's an acceptable compromise. Also, if people are talking a lot, then the mask tends to get pulled down off the nose constantly due to jaw movement. Hence in Japan you'd see store clerks and people in such roles often wearing the mask that way. Also this happens practically every word for many kinds of cloth masks. So if you see a public speaker somewhere with a fancy cloth mask not covering their nose (a shaming target I've noticed on twitter etc.) they probably can't help it.