ADD vs. Short Attention Span

A.D.D. is caused by a lack of a certain chemical in a human's brain. But could the amount of that chemical be considered a part of that person's personality? Maybe, they just have a short attention span, and they were built with it that way. Is it correct for humans to control what might not be a flaw, but just a part of the individual? A short attention span might influence schoolwork etc, but so does intelligence. A child that has difficulty writing a ten-minute speech for example, might have a hard time sticking to one subject. The child could pick the subject of courage, or politics, o…