Like with any medical test: if you do more tests you will find more incidence. The same thing happened with various forms of cancer screening. If we were to test everybody for everything very few people would be found to be 100% and a lot of unnecessary procedures would be the result. Given the obesity problem this result should not be a surprising finding anyway.
Are you advocating that we shouldn't bother testing instead? I'd imagine that many people would be quite interested in knowing the ways they're not 100% that might actually kill them... like cancer.
Here's a good overview:
https://sciencebasedmedicine.org/a-skeptical-look-at-screeni...
Info about thyroid cancer over diagnosis:
https://www.npr.org/sections/health-shots/2017/05/09/5275692...