The court's ruling is valid. Obviously the person has standing to file a lawsuit, the challenge is convincing a jury that your friend should have taken more care in saving your shitty life.
As for good samaritans in general, there's a good way and a bad way to do something. I don't suppose to know how this good samaritan conducted herself in her effort to save her life. If she took unnecessary measures I don't see how this case would be different from that doctor who
cut off a patient's penis without asking permission because he detected cancer.