As soon as Gary left, Hewitt returned to the basement.
The improper catalytic method of the saints often leads to some instability in the mind of these legendary fighters, but they are also far from being easily deceived by a few words.
Although saints can be mass-produced, and they can't access the core decision-making power of the church, the cost of their loss is much smaller than the fall of ordinary legends.
But at the same time, there can't be too many of them, and retraining one takes about twenty years of wasted time.
So the church would brainwash the saints with imperceptible indoctrination as soon as they are born, making them loyal to the church.
The power they possess also comes from Gavyn, so if Gary does not lose his power after betraying the church, it means he still considers himself a believer in the goddess, which is one of the reasons why it's hard to exploit the mental defects of saints to turn them against their controllers.