But, as your question points out, I'm not really talking about destruction so much as I am about capital lying fallow for an extended period, and the chain of production—which endeavors to work as a well-oiled machine—being disrupted. My central point is that our ability to produce was greatly curtailed, resulting in less goods and services available.
Finally, I'm not quite sure what you mean by "who" and "why." I'm not pushing some kind of conspiracy theory. I'm just making observations of what has happened.