There are some people who have been actively pushing the idea that it isn't real because they are anti-meds. Scientology is only the tip of the Iceberg. I was so angry when I heard Lee Camp making the "point" through his comedy news show that folks are overdiagnosed and either him or (I think) somebody else talking about how it's so much better in France where they change the environment around the kid and teach kids with ADHD ways to manage their differences. Sure that WOULD be better if those of us in other countries had access to that level of service but most of us don't. Also, many folks with ADHD would still need the meds temporarily at the least (if not permanently) in order to help them form habits that counteract their symptoms. Also, because there's a common stereotype of neurotypical kids in high school and college popping stimulants to supposedly help them get better grades (debatable whether that's actually the case), that those with ADHD are just lazy.