The article is terrible and you've done a good job of explaining why. But there are two ways to look at this:
1. From an individual's perspective
2. From society's perspective
Let's make up some numbers for illustration. If getting a CT scan gives someone 0.01% chance of getting cancer, the risk to any individual is negligible. But to society, that means 100 extra cases of cancer.
But doctors have that pesky "do no harm" credo that makes them consider whether the benefit of CT scans is worth the harm of 100 people getting cancer that wouldn't have otherwise gotten it.
It is proper for society to examine this without dismissing 100 people getting cancer as "negligible".
1. From an individual's perspective
2. From society's perspective
Let's make up some numbers for illustration. If getting a CT scan gives someone 0.01% chance of getting cancer, the risk to any individual is negligible. But to society, that means 100 extra cases of cancer.