N_, I think too much significance can be placed upon testing, just as too much can be placed upon modelling. As SA points out, it is the medical staff who have direct experience of the effects of covid-19 upon actual individuals. It is medical staff who learn what works under which circumstances to improve given sufferers’ conditions, or fails to.
Yes, there will be errors both ways, but different reporting systems in different regions and countries will also extenuate those errors one way or the other. The situation is changing fast, and people are learning fast. In a few years time much will be realised in retrospect…
…In the meantime, we should all exercise patience and tolerance. Please pardon me for saying so, but you seem highly critical and indeed angry with entire professional groups. Such groups of course consist of diverse individuals, some better some worse, but all conditioned and habituated to various extents under the corrosive and abusive system that we have all been suffering under increasingly during its ascendency over the course of decades.
Ultimately, we need unity and communality among people, whereas the toxic system both exploits and encourages division between us. In the current socio-political environment, forgiveness, tolerance and respect become revolutionary attitudes.
Love and Rage to you, N_.