experience with the "Novel" virus in the early days of the pandemic...i.e. 20/20 hindsight is inappropriate...good people tried to do the right thing, but had to deal with a considerable amount of misinformation...some of it malicious (e.g. ingest 'Bleach' to fight COVID). While the school closures were damaging to kids' learning...she doesn't call for no closures at all, just better preparation for a future pandemic so that they are not extended too long...she also failed to adequately address the concern for opening schools when vaccines for teachers, et al, were not available...that's a gaping hole in her assessment.
You still have a lot to learn about responding to a pandemic.