I think that's a bit out of context:
" 1. There is a role for school closure in response to school-based cases of COVID-19 for decontamination and contact tracing (few days of closure), in response to significant absenteeism of staff and students (short to medium length, i.e. 2-4 weeks of closure), or as part of a larger community mitigation strategy for jurisdictions with substantial community spread* (medium to long length, i.e. 4-8 weeks or more of closure).
2. Available modeling data indicate that early, short to medium closures do not impact the epi curve of COVID-19 or available health care measures (e.g., hospitalizations). There may be some impact of much longer closures (8 weeks, 20 weeks) further into community spread, but that modelling also shows that other mitigation efforts (e.g., handwashing, home isolation) have more impact on both spread of disease and health care measures. In other countries, those places who closed school (e.g., Hong Kong) have not had more success in reducing spread than those that did not (e.g., Singapore)."
Basically if we have substantial spread (which is subjective but I presume more than our current state save Seattle) then schools should be closed along with any other place. Otherwise it shows that closing schools likely won't affect the infection rate. Maybe the CDC is underreacting but this is why I think there is very real over reaction happening that will have substantial consequences to the economy. Listen to the CDC and head their advice. No more no less.