First off, way before getting there, is this person healthy enough to take care of a live animal? That's right from the start. We need to implement an interview process, a home visit, and make sure that the environment is also safe for that service dog. Is that person ready right now to get a service dog? He or she might not be ready for years. It's not just a fixing a problem thing. A dog is a lot of responsibility, and not every veteran can afford one or take care of one.
It's not an answer to the injury. It's helpful. It's a tool to help you get better in order to get to the next level, which is regaining dignity and confidence and socializing, etc.