I'm guessing hindsight will tell us the cost-benefit of sending kids to school significantly outweighs the cost-benefit of the school shutdowns. And that's not even mentioning the actual effectiveness of school shutdowns in restricting the spread of Covid. We're already seeing very little difference in infection and death outcomes among children from areas that shut down their schools for a long period of time to those that did not.
In time I expect the narrative will turn to recognize that the policy consequences of "almost immune" would have been much preferred to the "sky is falling" rhetoric that resulted in schools that were closed for more than a year and the resulting educational and developmental damage that has caused.