I do not know that these things should have been unforeseen as much as just not spoken about. I think these issues (or at least some of them) were always in the back of our minds.
Here is an example of what I mean. New York Gov. Andrew Cuomo made a realistic appeal that areas not severely affected to date with COVID-19 send their ventilators to New York rather than keep the machines in areas where they are not yet needed. By the time they are needed New York can send them, and more, ventilators to those hospitals. In the back of my mind is Cuomo's statement that people are on the machines for weeks (he gave the estimate of 21 days) and the time frame other areas have become hot spots. In other words, a city could send away its machines and need them two weeks later but not be able to get them back because they are in use.
That is how it seems the economy "bounce back" is being presented. At glance it sounds reasonable, but just don't look too hard.