You are 100% correct. Different people could look at the situation differently.
That's why Michael turned it over to Judge Greer. This was Judge Greer's decision, not Michael's.
Judge Greer reviewed everything and came to the conclusion he did.
"Greer is being highly presumptive, and should have erred on the life-side, IMHO."
If Judge Greer could not find "clear and convincing" evidence, then yes, he should have ordered the feeding tube to remain.
So it all boils down to a subjective assessment.