It's also cruelly ironic that those who are already sick are likely to get sicker as a result of their care - bacteria in hospitals, mistakes during surgery, side effects of chemo, etc. Some of this is the purpose of the therapeutic profession - it is meant to serve the vulnerable, and as a result it attracts people who prey on the vulnerable.

But what you're saying is the profession itself at heart is designed to prey on the vulnerable, if I'm reading you right. I don't disagree - if the therapist's approach is going to be to infantilize the patient, it is unbelievably easy to do damage, accidental or not.