Based on the highlights and abstract, that article focuses only on the likelihood of covid deaths, and contrasts the numbers in the elderly (high) vs children (low). While it is true that risk of death is low in children, there are other important factors to consider. We know there are covid survivors with serious long haul symptoms, but we don't know if organ damage in nonsymptomatic survivors would create significant downstream health issues. Not to mention natural immunity they get is superior ....
Another factor is virus spread. While children may not get sick and die, they can certainly be infected, and pass that infection to the people they are in contact with such as parents, grandparents, teachers, neighbors, etc.
I think vaccination is the way to go.