Many of the people who LARP use it as an escape from real life problems. In some cases this is mental health, for which role play is a useful tool when learning to manage your own mind. In this video are just two of the success stories: (in order of appearance) Alyx and Jess.
Jess has suffered problems such as anxiety, borderline personality disorder and depression. Going to LARP has helped her pull through tough times and given her the strength to deal with them.
Alyx has suffered with depression as well. LARP helped her identify triggers and find new ways of overcoming them.