Hearsay is hearsay, in real life, no matter what FL rules are. It's a "he said & he said" situation. The victim here was not asked for her testimony - which would have been truly direct, not any1 else's.
As for the "upheld" smoke&mirrors - the procedures of the lower court were upheld, not necessarily the lower-court opinion that Terri truly wanted to die.
You apparently do not understand the legal distinction between 'hearsay' and 'testimony'. 'Hearsay' is, "John told me that Jim said X". 'Testimony' is, "I personally heard Jim say X". What MS and the corroborating witnesses told the court was not hearsay.
the procedures of the lower court were upheld, not necessarily the lower-court opinion that Terri truly wanted to die.
Of course, that's what appeals courts do. It was ruled on appeal that Greer did not abuse his discretion.