That's the thing. His parents have known about his asperger's since he was very young. He is capable of learning habits, but they would let him do nothing but sit around watching TV, YouTube and contribute nothing because it was too much effort to teach him.
Believe me, I spend a lot of time listening to him to understand how he thinks. He does think differently, but he is capable of learning. It's just much harder to do now that he's 23 instead of 3. It has become my job to turn him into a functioning adult. In a lot of ways I'm a lot more patient with him than his parents because I will listen to him, I don't cut off his explanations, and I will explain why he needs to do things and I will patiently wait for him to do the task rather than jump in and do it for him when he's slow because he gets distracted by some aspect of it.
Edit: I do care about the kid, so do his parents. They're just busy trying to make a living like the rest of us. I just come here to vent my frustrations.