Earlier quoted context omitted.
So much of school is socialization with other human beings. Beyond academics, children need to experience being in a group and learning about how people are supposed to interact with each other. And most of this is not explicitly taught, but acquired through trial and error and simple monkey-see, monkey-do. You can't get that level of interaction and fidelity online.
Sure. But then you end up with adults who are incapable of socialization outside of school. Maybe having children develop making friends outside of school is a good idea.
What? You're going to let your children have playdates? In the middle of a pandemic?!