We already know about viruses that sit inside people asymptomatically for years and years before wreaking havoc. Of course we cannot live permanently paralyzed by “what ifs,” but planning that focuses entirely on mortality rate is ignoring a huge, huge piece of this equation.
That's way too high. According to https://www1.nyc.gov/site/doh/covid/covid-19-data.page, 0.65% of New York City residents have been hospitalized for COVID-19. Antibody tests show at least 20% of NYC residents have been infected, so the hospitalization rate is more like 3%.
Also, even if that weren't the case and everyone did recover completely after two weeks, missing two weeks out of a 15-week college class is quite a bit. So even if your plan is to have your students get covid at some point in the term, have some fraction be asymptomatic, some fraction recover from it, and a couple of them die, you still need some sort of coherent educational plan for the large fraction that are going to be in the campus ICU for a couple of weeks.
You may not die, but you may not be able to practice your favorite sports ever again because of permanent lung scarring.
The parent comment may be referring to the growing number of “long haulers” who have “recovered” yet seem to be suffering from chronic symptoms. [1]
This may be anecdotal, but it’s a growing number of people and worth taking seriously. This is a novel virus, after all.
1: https://www.theatlantic.com/health/archive/2020/06/covid-19-...
Not necessarily "absence", but it does provide an upper bound. There are millions of people who have survived the virus. If it was common to be incapacitated for months, we'd have more than anecdotes.