Not really like Schiavo since only the doctors want to pull the plug. But it illustrates that once you start down the slippery slope, there is no stopping.
The solution to this problem is to have the legislature do its job, and pass laws that govern this instead of simply leaving it up to the parties and the courts to decide what to do based solely on their own preferences.
But like so many things, the legislators think their job is to collect a big paycheck, make speaches, and be famous. They don't seem to comprehend that they are responsible for making policy, and even if they did, they have no clue how to do so since the qualifications for getting elected have no relationship to whether you understand policy issues.
Unless the legislature is made up entirely of physicians, attempting to cover every contingency of when to end life support would be futile. At some point, the opinions of experts have to be trusted and have to be final. Do you really want a legislature to determine whether one of your relatives lives or dies, or would you rather a physician who knows your relative make that decision with your family.
Note that the vast majority of these cases are resolved between family and physician. It's the exceptions that make the papers.
Note also that in both of the cases in Texas, palliative care is what is needed. Both medical facilities are acute care.