Except we've had tests this entire time. All counts of cases from all countries are based on actual testing, because these tests are the descendants of the ones for SARS. At this point, we can only be undercounting.
As China starts ramping up again and the West deals with the virus, you'll have pent up demand that needs to be filled. Consumer staples are going to go very well as people are panic buying.
Not about fear-mongering: rather, seems better to mitigate exposure to extreme harm rather than be anxious about the possibility of it happening.
A Harvard professor explains[1] that denial is far worse than panic. The latter jolts us into a state of preparedness, while the former will result in many deaths should things turn out differently than expected.
With regards to the author's disagreement on the 2% number, I am not sure they are correct. The author says that there is testing bias, but I'd imagine a good sample of people in Wuhan have been tested by now, and yet China's reported mortality rates are still just over 2%.
And 2% is a big deal, so we should take this seriously - we should panic. 2% means mass graves, and it means ten times the casualties of the Holocaust. Utilizing panics to influence policy to have a well-oiled rapid-response plan in place for pandemics cannot be a bad thing. The CDC's recent missteps are evidence of this. Perhaps we are lucky that COVID-19 might "only" be 2% - we shouldn't assume that the next pandemic will be as kind.
[1]: https://nieman.harvard.edu/wp-content/uploads/pod-assets/mic...