I think the key word in this quote is “case-specific.” What we have in many situations is a set of guidelines to apply, and unless there is a gross violation of those guidelines, the people are acting in the realm of morality. The guidelines include various aspects including: prognosis of the patient, the potential improvement from the treatment, the chances of obataining that improvement, and the burdensomeness of the treatment in relation to all that.
You could imagine a sort of graph for this: one line for each aspect. The lines will not necessarily be straight. Like gallons per mile, the line might curve.
In this particular case, *about which we do not have all the relevant information, *we have the extraordinariness of the treatment–this may be the earliest gestational age at which this has occurred; we have only a general, not particular, idea of the prognosis; we have a huge *general *gap between abandoning the treatment or successful outcome,…
However, we do not know, and the doctors may not even know, the condition of the baby.
So all we can really consider is the general guidelines and how they might apply to *what little we know *of this particular case.
Even this is difficult to say. In the old days, vitamin deficiencies could cause serious illness, but the treatment was inexpensive and easy to take. At one point, it was experimental, bit who would turn it down or deny it? The risk was low, the potential for return was great. So one cannot say that even experimental treatment is always something one can refuse for oneself or another.