Purposefully exposing young people to increased risks of major brain problems - even death - for sport is surely even more ethically complicated than sending young people into this same neurological danger zone as soldiers.
Alice Domurat Dreger (/ˈdrɛɡər/) is a historian, bioethicist, author, and former professor of clinical medical humanities and bioethics at the Feinberg School of Medicine, Northwestern University in Chicago, Illinois.[3]