A full body scan is a bit like p-hacking. If you have a hypothesis of what might be wrong and perform a specific test to see if some value is within normal rang

A full body scan is a bit like p-hacking. If you have a hypothesis of what might be wrong and perform a specific test to see if some value is within normal range, there’s relatively little chance of a false positive. If you test everything at the same time, some values are bound to be outside of the normal range, just because you’re measuring so many things at once. Doing any kind of procedure to further investigate or treat the symptoms has a risk associated with it. In the end, doing a full body scan, with current medical technology (both in terms of the test equipment as well as our means to treat anything that comes up as a result of the test) is a risky thing to do. It sounds nice in theory, but unfortunately we do not live in the utopia you speak of.