I was just watching this online. I'm not a huge fan of Doug Wilson's work. Not everything he says is complete rubbish, but there's a lot I don't agree with.
As someone who has worked as part of a team involved in diagnosing Autism Spectrum Disorders, ADHD and other developmental disorders, I do have some concerns that he seems to be suggesting that some children and parents (particularly those with milder forms of these conditions) may in fact be attention seekers.
I've been around long enough to see that in at least some of these cases, parenting and behaviour management strategies may not be the most ideal. And there are some professionals who may err on the side of over-diagnosis. Often under pressure from schools and other educational settings who are desperately chasing funding to support children who are having difficulties managing in these places.
But there are many children who DO have these conditions. And in some, although not all, cases, medication may be of assistance (to be fair, he does point this out during the video...).
To suggest that these parents are looking for attention and copycat diagnoses is not helpful. To be honest, I think he needs to learn a bit more about Autism Spectrum Disorders and ADHD before he says this sort of thing.