AAQ:
I am somewhat familiar with the psak from Reb Moshe ZT”L. We should take note of the date. For quite a few decades, schools of psychology and social work, and I presume other mental health fields) were adamant that the beliefs of the clients/patients be left alone. These school teach that delving into them is a violation of one’s personal rights, and that this would constitute a violation of professional ethics. At the time of the shailoh and teshuvah with Reb Moshe, this was not the accepted position. Reb Moshe was correct in directing that one should not allow a professional to tinker with one’s emunoh. The fear of the “min” or “kofer” was the tendency they have of seeking to push their agenda, and there would be a need to create boundaries to prevent that.