a court order is still a decision arrived at with all the facts in the open...nobody is doing it secretly even if the end decision goes against the parents and/or the mature childs wishes
for a doctor to make an arbitary decision in a closed off arena is a completely different thing entirely
and who says its lunacy anyway...there are still plenty of medical staff who understand the benefits of treating the patient rather than the illness
and there are still plenty of people in the medical profession who will not take blood because of the health risks and not for any religious reasons