I'd actually assume it should be more "everything will be fine." You specifically broadcast the reaction you want to get from folks. Someone down thread posted the video to the nocebo effect. It really is far more effective than makes sense.
Problems are legion, of course. Is it something inherent to the people that are impacted by this? Would make some psychotic disorders interesting evolutionary defenses.
And, of course, there is no reason this has to be limited to medical behaviors. Teaching and coaching can be more effective for some people, if you tell them what you are doing is going to be effective. This actually tracks remarkably well with how so many advocates for different techniques all lead with usually over the top assertions on how what they are doing will work. Often more so than on why it would work.
Problems are legion, of course. Is it something inherent to the people that are impacted by this? Would make some psychotic disorders interesting evolutionary defenses.
And, of course, there is no reason this has to be limited to medical behaviors. Teaching and coaching can be more effective for some people, if you tell them what you are doing is going to be effective. This actually tracks remarkably well with how so many advocates for different techniques all lead with usually over the top assertions on how what they are doing will work. Often more so than on why it would work.