The reason some people still mask is very simple: For anyone who follows basic science, not what the crowd is doing -- N95 masks in enclosed / crowded situations are still a good idea, especially for those of a certain age.

Many people continue to wear useless (or only marginally) useful masks, and in non-crowded situations (even way out in the open). Which of course ranges from silly to, at best, only marginally useful. However it seems safe to suppose that they're doing so primarily out of strictly rational concerns (however faulty their understanding of better masking practices may be). Some partially, or entirely out of fear (an understandable reaction, if they've experienced a heavy bout of Covid, or have seen its effects in others).

Also, some may remember the temporary shortage of N95s, and still think they're being good, self-sacrificing citizens by wearing less effective (or even basically useless) masks. Or they just don't like wearing N95s because they're too constricting (meaning, "too effective"). However, that is at best a secondary factory, and not the main reason why they choose to mask in the first place.

But to recap: For the vast majority of folks who mask, it's out of (perhaps flawed) sense of pragmatism -- not because they are superstitious idiots, or primarily motivated by some subconscious desire to make a social statement about "who they are".