You really don’t know anything about ADHD at all, don’t you? To start with, we only make up about five percent of the population, so we cannot serve as an explanantion to describe society-wide phenomena. I presume that by “humanity’s declining attention span”, you mwan that old spiel about people only being aware of what is on TV, which is not what ADHD is about at all. The annual profit on ADHD medication is less than five percent of that of anti-depressants, and Methylphenidat prescriptions have plateaued around 2010-2012. Oh yes, and it really does not take long that my brain does indeed work differently from normal people’s, something I clearly inherited from my mother (as so often, she was one of the cases where, when her child was diagnosed, so many strange problems she faced throughout her life stated to make sense…).