It was possible to travel and live freely in Iran until the Ayatollah took over. I've friends who lived and worked there but had to leave when everything changed. Photographs taken show them all wearing western clothes and friendly relationships between various nationalities, including Iranians.
Police Officers, fire personnel, social workers, teachers, NHS staff are amongst many who find themselves struggling psychologically because of their work experiences. Or because something happening in their personal lives is impacting on their ability to work effectively. All those organisations offer counselling services to their employees. Free of charge and confidential. Very much like that on offer for current and former military personnel. The difference I suspect, is that the military are less open to the reality of the psychological trauma its employees can suffer. The police used to be very similar, but thankfully has moved forward. If you're living on the streets, drinking and taking drugs, engaging with therapeutic services of any kind is unlikely