This is a false dichotomy; if Sars-Cov-2 had occurred at the time of the Black Death, hardly any deaths would have occurred and society would have barely noticed it.They may have "just got on with it" but they also died in their millions. The Black Death wiped out more than 30% of Europe's population - some estimates are as high as 60%. Would you be prepared to accept that death toll and all it would entail?
If the Black Death occurred now, the fatality rate would be exponentially higher than we saw with Sars-Cov-2, especially as it affected younger people (obviously).