A huge number of healthcare systems around the world still use graded exercise therapy (and CBT) and that is known to actively hurt patients with the condition,

A huge number of healthcare systems around the world still use graded exercise therapy (and CBT) and that is known to actively hurt patients with the condition, so I don't think that is sure at all. You would have thought the basis of medicine where first do no harm might be their first instinct but it really isn't.