I suppose the question that springs to my mind in relation to that is a blood transfusion to save a child’s life . The parents refuse , perhaps for religious reasons , and the child will die without it . If you’re consistent I presume , or I’m guessing you believe that child should die or at least take its chances ? I may be wrong but I think in the majority of cases the state takes the decision from the parents and ensures the welfare of the child .
Obviously it’s not the most accurate of comparisons because that child’s ill health doesn’t impact on others around it but clearly the decision on the what goes into the body is removed from parents to ensure the health of the child .