So you think parents should not check whether their genes contain markers for incurable diseases? Let more sick children be born? With prices like several milli

So you think parents should not check whether their genes contain markers for incurable diseases? Let more sick children be born? With prices like several million dollars for the cure for this disease, majority of parents (except for rich countires) will not be able to afford treatment. According to Wiki, "Sickle cell disease occurs when a person inherits two abnormal copies of the β-globin gene (HBB) that makes haemoglobin, one from each parent". So this is a disease caused by errors in DNA sequence and it can be predicted whether the child will have it.