I was similarly confused. Saying a MRI is the equivalent of stopping smoking for 1 year earlier, or driving a motorcycle 10,000km less seems actually really good! Go MRIs!

As another point, most of the negative costs of getting full body scans are actually poor reactions to the full body scans. The phrasing is "Hey, if you get more information, we are going to act badly on this information." I think the solution here should be just acting better on the information, not getting less information.