Were the decrees my client was encouraged to say repeatedly by the teachings at her I Am Temple of any benefit or was this a make-work exercise?

Like all self-administered mantras, visualizations, and decrees, they pertain to the self only. They arise from the thoughts, and they are sent to the self. Their power ends there. If they become a motivation to take positive action in the world, there is a benefit. But for the most part, this is a make-work exercise that has no value other than lulling the person into a false sense of accomplishment, thinking they are doing something useful to foster their spiritual growth and development when they are simply talking to themselves and, in effect, patting themselves on the back. They are simply engaging in wishful thinking that they will have an impact on things, but this will do very, very, little of any benefit. It is one of many such diversions that are advocated by the false teachers who themselves have been corrupted to believe in the approach. And all will lose because they are sidelined and ineffectual at a time of growing crisis for humanity, where a divine intervention will be necessary but will be unsupported entirely by the many who otherwise are open-minded and could be a tremendous force for good in a meaningful way.