It sounds like you are saying it's all right to be deprived of life, liberty, or property as long as you have due process of law. Normally, this might be true, but you have to have great faith in the process. It wouldn't be the first time it was wrong or abused. There are too many peculiarities about this case to easily accept the ruling that Terri Schiavo must die, especially when there is disagreement by the experts. It's too easy to see this evolving into a license to kill anyone who is a burden on 'society', whether physically, financially, or, eventually, politically.
As far as this case goes, all the irregularities you allude to may be true. However, I have not seen any independently corroborated evidence to that effect. Even all goes well with this case, it does not mean that a similar situation might not arise in the future. Then the process that you do not trust will be tested once again.
Having worked for a judge, I can tell you that judges do not go to their chambers every morning looking for controversy. They usually run from it. However, they are called upon to decide cases and controversies. They often have to clean up messes created by legislatures.
So, I do not take as cynical an attitude as you seem to have. The problem is that judges are overworked and are, as a general rule, poorly equipped to deal with this types of cases in an informed manner.