But this isn't the argument. The argument is about all the false positives you get when you mass-screen everyone. All those people then need to be further examined, overwhelming the medical system and causing distress for the individuals (who are, remember, perfectly well).

I agree if we had a test that was 100% accurate (literally never gave a false result either way), only detected dangerous cancers, and cost $1 then that would be a game-changer, but the screening and tests so far are not that.