And yet here we are with a virus that has an r0 much higher than flu, and is ~10 times more lethal.
That the two things are correlated in certain modeling scenarios does not mean you can't end up something that both spreads and kills.
Lethality estimates also suffer from being based on bad data. “Patients who have been tested for SARS-CoV-2 are disproportionately those with severe symptoms and bad outcomes.” [1]. For that reason, the CFR in the US at least has been around 1%, but the IFR could actually be significantly lower.
[0]: https://www.ncbi.nlm.nih.gov/pubmed/19545404/ [1]: https://www.statnews.com/2020/03/17/a-fiasco-in-the-making-a...
In terms of estimating the IFR, it's hard; estimates are about 0.7, much higher than flu.
Your link says 'mean R0 1.3: range 0.9 to 2.1'.
Compared to the mean R0 of flu, this disease spreads substantially more and is more lethal, hence is a good counterpoint to the flawed argument of the post that I was replying to.