A book is not a newspaper or a magazine, and a book that's compiled as an oral history should not be filed under "current events".
This is obviously written for posterity, and not for only the year 2021.
Were we take you at your exact word, the book's intended audience would only be people who read it between March and (presumably) sometime late this summer/early fall (it's anybody's guess), and therefore should have been written and edited specifically and only for that group of people. For all we know, and given the pace of the publishing industry, she could've turned in final proofs of the book last summer when people (including the Broadway League) were still speculating/hoping theatre would come back in early 2021.
You're faulting her for prognostication skills she never claimed to possess, and assigning her a responsibility that isn't hers, for a project designed for larger purposes and a longer shelf life.