Certain costumes offer some people a way of working from CCosgames's blog

Certain costumes offer some people a way of working through personal difficulties, Rosenberg said. Batman, for example, can be an especially meaningful cosplay choice for someone coping with trauma. Cosplay Costume The dark superhero faced devastating trauma when he was a child — witnessing the brutal murder of his parents — which he overcame to become a hero.

Cosplay is giving (mainly young) people a new-found creative output. Many will have skilled up in researching properties of materials to the point where they become real masters of those materials. Spider Man Suit  

Creative skills such as sketching and design development also become the norm for many people who were novices.