yeah, any religion (IMHO they all cults) may bring happiness to an individual. Just like booze or a mind-altering drug.
If that brings out the best that person can be..well OK. Why does it seem that for cults it so often ends in a murder spree, a suicide pact, sexual abuse..or in case of bigger cults (the big religions) genocide, bombings, and war.
They demand total authority, and suppress skepticism. How could that ever enhance human potential?