It's also insanity to pretend this is a matter of "trust". Any intervention is going to have some amount of harm and some amount of benefit, measured along man

It's also insanity to pretend this is a matter of "trust". Any intervention is going to have some amount of harm and some amount of benefit, measured along many dimensions. A therapy dog is good at helping many people in many ways, but I wouldn't just bring them into the room and "trust in the best". Measure and make decisions based on measurements.