By the time she was starved to death, it really was way too late -- most of her brain had degenerated into fluid -- and thus has nothing to do with the Wallis case. But I quite agree that more should have been tried much earlier, and I have a nasty suspicion that the reason it wasn't was because her "husband" didn't want medical experts looking her over too closely because it might have shed a little too much light on how her original collapse was brought about.
Amen, GS. Wise words ...
But I wouldn't agree that it was too late ... but then I'm an eternal optimist.