Because we don't live in a world where individual governors get to do everything they think is right, even when doing so violates the law. It not only would be wrong, it wouldn't work. Jeb would not be governor and Terri would be starved. And Jeb doesn't have all that much moral authority to do something when the damn republican legislature failed to pass supporting legislation.
SHOULD JEB GROW A SPINE AND ACTUALLY FULFILL HIS LEGAL AND CONSTITUTIONAL DUTIES TO PRESERVE THE LIFE OF TERRI SCHIAVO, IT WOULD NOT BE ILLEGAL.
Judge Greer has absolutely no authority to tell Governor Bush what to do, nor does he have the authority to injunctify the Exective branch in this case. But he's still getting away with it.
And yes, the Legislature are a bunch of wimps. But so is Jeb Bush.