Well actually let’s find out whether they do cause it or not. Patients ought to know the risks beforehand if so.
The calculation as to net benefit can be done later.
Largely agree, but still very much depends on what you're screening for. For example, my oncologist still recommends CT over MRI for post-surgical screening as the increased resolution makes it possible to detect tumors a bit earlier.
I’m not familiar with the parameters of the machines readily available to your provider, but I can say that the risk/reward scenario for an intervention for someone coming out of cancer surgery is distinct. We give cancer patients chemo and radiation that we would never give to someone who just showed up in the ER or was still undergoing preliminary diagnostics.
You can very easily come up with reasonable plans to euthanise sub categories of the population to "save" lives if you only care about the total numbers of people surviving...