Students are not the only members of a community or geographic area.

I’m unclear how this is a relevant comparison to “Covid in Australia” or “lockdown strategy” beyond ‘smaller numbers are smaller’

If you are going to compare the numbers you just provided (which are not a good direct comparison), then it shows that it’s considerably more out of control in your school than in NSW, which is the least contained outbreak in Australia.

26k active cases in 8.1M population. Approx 0.3%.

35 in 2645 is 1.3%.

Other states of Australia are considerably better. So again, what is your point?