I don't think masks negatively impact society. I think they can be rather critical, depending on context. Some people are pressured, but it is still they who give in to the pressure. Is it healthy? I'm not so sure, but I wouldn't expect people to be transparent about everything (not saying you have the expectation). There's variations and gradations to this. There is usefulness to a mask, especially in security and/or exposing grievances and wrong-doing. Not all heroes can reveal their identity. Even on a more personal level, there is still usefulness to not revealing all your cards. To be totally transparent exposes some vulnerabilities and diminishes some level of personal value.