This is more true than people realize. My wife and I got full body MRI scans.
Both showed "possible" medical issues. My though was "Great, I have a baseline, in two years I'll get another one and compare".
My wife on the other hand got a bit obsessed about her results and had what was probably an unnecessary procedure to biopsy something, which turned out to be benign.
I suppose you could argue that another way...better safe than sorry...but the stress that is caused by known uncertainty vs unknown uncertainty can be too much.
> ...unnecessary procedure to biopsy something, which turned out to be benign.
The point here is many issues can't be resolved safely with a biopsy or minor procedures, so one ends up under serious risk of a major surgery for something that would never cause any damage.
Plenty of people die this way. If not, one might even thank his doctor for saving his life afterwards.