New Zealand just shut down the country because 3 or 4 people in a family got sick. Seems medically sound. But the whole country? How are people going to eat if they're not producing?
They did ok up till now, so why would this re-occurrence be any worse. You've been predicting the end of civilization for a while now but it's not happening, is it? People do what they always do, they adapt.
As for the different school re-opening plans, until best practices emerge, people try different things. I don't understand why you choose to interpret this as experts trying to confuse you. It is nothing of the kind. Besides, after repeating that point of view 1000 times, it's time to move on to something new I'd say.
Your constant refrain about experts confusing you doesn't hold water. They've been consistent from day one, maintain distance, wash/disinfect, and more recently wear masks when forced to be closer to others. All the other speculations about this and that were just that, part of of the ongoing conversation, not policy, not confusing instructions. Your best bet is not to read those, they seem to alarm you unnecessarily.