That's a valid point.
I ran the chaplain school, so I'm very familiar with how to treat PTSD and how to train chaplains to work with people dealing with personal issues that may require expertise or medical intervention and so on. We teach our chaplains how to work with that individual without compromising the therapeutic or the pastoral relationship between the chaplain and the individual, yet building on that pastoral relationship to encourage that individual to self-disclose.
Sometimes you're successful and sometimes you're not.