Projection of your overall health & cleanliness?
Of course, we cannot expect us Westerners to have that level of compassion and common sense.
The people I know who still wear masks and myself wear them so that others don't get our cold, not necessarily to protect ourselves. A form of respect towards co-workers etc.
While it’s not a majority of people, I still routinely see people wearing masks out and about, particularly on public transport. But I suspect it’s primarily as a defence against other peoples germs. Which I’ll admit is why I’m currently looking at nicer less “hospital” masks, notably a few companies that make respirators had a mini boom and diversified into “everyday wear” models that didn’t look like you were fumigating for termites. There are reusable respirators that just look like nicer disposable ones now.
It’s also helps that people don’t find it as weird if you have a mask on when riding a bike since that’s been sort of a normal look for a while, pioneered by both the Lycra wearing enthusiasts and the boom in bike couriers thanks to food delivery apps and no one riding as a courier wants to breath car and truck fumes all day.