Earlier quoted context omitted.
By lack of a pile of bodies.
I think that the reported numbers of deaths place some bounds on the kinds of hypotheses that are tenable, including those suggesting that there is already a protective level of herd immunity, or a vanishingly small death rate. For instance, one early hypothesis was that the virus was endemic in our population for a long time, but that doesn't explain why the death rate shot up suddenly over the past month. And 15000…
This is it. The (short-term) financial incentives to opening up the economy are _massive_. Anyone trying to support that will jump all over some weakly supported hypothesis like this.