That's why its not therapy, its spiritual counsling. Parents can make their kids go to church, which is essentially what this is.
There is something odd about forcing people to go to "voluntery" programs. An acquaintence of mine was sentenced to AA in one year of weekly AA meetings as part of a DUI sentence. The group leader signed his entire pass book in the third week of his attendence because he was "not with the program". But as he pointed out to her he was required to attend, not to believe in their mission or methods. His time to talk began with long loving descriptions of the cocktails he had been drinking the previous day, what wine he was going to have with dinner after leaving, etc. Obnoxious, but effective. That's why it's hard to force people into true volunuteer programs.