I've taken clowns into the war in Bosnia, the refugee camps of Kosovo, and none of those are any more important than clowning in a subway or an elevator or just walking down the street.
Clowning is a trick to get love close. I can hug 99 percent of people in the first second of contact if I'm in my clown character. The clown assumes your humanity. It assumes that, whatever trauma you've had, you can still love yourself.