Actually the 2DCA in Florida found that Micheal Schiavo was conflicted because there was money involved and he had broken the marriage contract. Contracts, marriage or otherwise, apparently are just pieces of paper to you.
Moreover, Florida law prohibits any guardian from being appointed who "may have a conflcit of interest". Which is why Terri Sciavos death was court ordered. When states issue orders condemning citizens to death American jurisprudence and precedent requires judicial review on the federal level. When you argue against that, you argue against the Constitution and individual rights.