In reality, the person that gets saved is always the person that the savers want to save. From situation to situation there are a huge number of variables affecting what the savers' desire is. These situations are often unrelated to a person's disability status, and usually have a lot more to do with how much the saver likes the savee.
I'm physically disabled, and some big determining factors as to whether I will be helped or not are: how much I am liked by that person, if I can satisfy their religious or political ideology, if I can give them a way to help me that brings meaning to their lives, and if they can make themselves look like a good person to their peers.