In a perfect world you're right. What it's getting at is that screening itself isn't very good in the grand scheme of things, and thus the negatives of extra screening can be argued to be worse than the extra screening. Whether or not that's true, well that's another matter.

The issue in this subthread was the notion that the only thing between the current state of affairs and high quality screening is a bit of disruption. The problem is hard, smart people are working on it, more smart people are always welcome, it'll still take a while.