More broken reporting. 
When one takes a moment to read the letter itself, the physicians make a measured argument that the mental health case rates outweigh the COVID risks IF far more thorough testing measures can be taken than are currently available.
A more fitting headline might be:
Fewer than 2% of Ontario Physicians Advocate Return to School, And Then Only with Rapid Tests Available Every Two Days for At-Risk Staff and Student Households
From the letter:
Numerous jurisdictions around the globe have made a commitment to keeping schools open, regardless of case counts, and we need to do the same. As such, we recommend:
- Protecting in-school attendance utilizing a “test-to-stay” strategy whereby children and youth,
their siblings, and teachers remain in the classroom following a close-contact exposure, with
frequent rapid antigen testing, as recommended by the Centres [sic] for Disease Control and
Prevention.
- Frequent testing (e.g. every second day) of school-based contacts has been shown to be
equivalent to self-isolation for control of COVID-19 transmission.
Their argument is based on data before Omicron, and the hope it doesn’t get worse.
Today, I would treat anyone outside of my household with a sniffle as a potential exposure: our case rates are at a record, test positivity is over 25%, with over a full day backlog (we’re likely 60% under-reported today).
We’ve had the discussion with our kids, and will be delaying their return to school for at least a couple of weeks, regardless of what the Ontario 
provincial government says in the next few days.
Edit: Tests are 60k behind, but have ramped up since I last checked to ~60k/day.
