Not quite sure you're posting with a stick up your ass DPG. If anything, people with ADD are mentally different, not "weak". There's a few articles about successful businessmen who have used the "benefits" of ADD/ADHD to their advantage.
And no one is saying they'd die without drugs, obviously. People with PTSD won't die without meds either, will they? I guess tha means PTSD is made up, too. In fact, nearly every mental disease must not REALLY be a disease.
In fact, if we're only going for "death" as a sign that a disease is real, I guess arthritis doesn't count. A flu is no longer a "disease", unless you're a kid or old person. Chickenpox is no longer a disease either, unless you're older than a child.
You know, the whole idea of "death or it's not a disease" sounds complicated and stupid. I guess that's why doctors don't use it, huh?