What would be good data which is actually practical and ethical to get? I hope no review board would approve a plan of "group A will have a professional therapi

What would be good data which is actually practical and ethical to get? I hope no review board would approve a plan of "group A will have a professional therapist following protocol XYZ, and group B will be handed a dose and a printout of a reddit thread and told to have fun" Sometimes we don't have good data for good reasons.