I think it is a slippery slope to say that freedom of movement trumps all other rights. No one has the right to kill me and my children just so they can exercise their right to go wherever they want whenever they want.
At least as far as COVID is concerned, and that's because COVID isn't a realistic concern for most children.
There are people (children, but also others) for whom it is a marked concern, and appropriate risk mitigation strategies should be taking. Working with the gung-ho assumption that all spaces are essentially risk free would represent a fail in your duty of care.
Some of us are more afraid of an all powerful state using any excuse to further their own interests.