Of course you're right, but there's a misunderstanding there.

My point is people who went through the experience of having test results compatible with cancer and then discover it is just a false positive (which technically it's not even true, there's no cancer diagnosis before a biopsy, it just can't be excluded), well, these very people seem to speak out against screening, or adopting more extensive screening policies, because they had a "false positive", and "it's stressful".

I am pretty sure all the people whose lives were saved by screening find that pretty selfish.