Why Herd Immunity Won't Save Us from the Covid-19 Pandemic

Indeed. The article doesn't seem to consider the probable "wave" nature of this and pandemics. 70% having caught it this time around might result in a level of herd immunity by the time the second wave should hit. Otherwise it is correct - we still need to slow it down, as we have been with self-quarantine, etc., so that the hospitals don't get overrun in the meantime.

One should understand the phrase "flatten the curve" doesn't come with the expectation that fewer people will get infected over the years we expect to be dealing with covid19. If we slow it down, more people can be treated adequately, which is likely to result in increased survival rates.