.... and the bit after that said they should isolate if they test positive.
As for symptoms yes, a lot of attendance is going to be wasted for colds, flu and so on - but when there’s such an overlap of symptoms with COVID that’s always going to happen.
It basically boils down to would you rather find out it is COVID in the community early or late? That is the key thing here; with early detection we have a good chance of stopping it long before restrictions and lockdown; without it we don’t.
For me, I'd rather find out late and live in a liberal democratic society than find out early and live in China.