listen, nobody is saying the kids won't get it. if you send your kids to school, there's a good chance they're going to catch something or other - the cold, the flu, covid-19, whatever.
the point is that, as far as we can tell at this point, it's not going to affect them very much. so, as long as the kids aren't living with elderly parents...
of course, if you had children very late, or you live in a large extended family that includes old or infirm people, you might want to avoid sending your kids to school. in general, those are scenarios where families have extra responsibility to protect the people around them. in reality, great-grandma probably can't handle the regular old flu very well either, and you really want to keep her away from that, too.
so, yeah, your kids'll get sick. but, so what?
https://globalnews.ca/news/7254294/coronavirus-student-tests-positive-georgia-school/