I live in the US and I have normal social interactions with my coworkers, not really trying to hide my real personality. That poster is exaggerating the danger, IMO.
It depends on what you need to hide. I’m an introvert and not a neurotypical and struggle wearing a mask at work for extended periods of time. I’ve adapted to display what is expected of me in those settings but it’s tiring to not be able to be onself…