You must not know many parents then.
Parents I know that have children with ADHD recognize their children are struggling beyond simple hyperactivity. These are children that are markedly behind their peers in childhood milestones regardless of their family upbringing, education, and socio-economic status. These are children that have a deficiency in the executive function of their brains where hyperactivity is one of many symptoms, and is not even necessarily the most worrying.
These are children that struggle with simple tasks that other children do not.
Parents of these children are no less loving, caring, or capable than parents without ADHD children. Parents should not be shamed for using effective medications (like MDH) so their children can have positive outcomes in their development and adult-life.
> What we really need is a strong emphasis on family development, courses built around it and support groups
ADHD is generally a disorder that you are born with. No amount of family development can prevent the disease.
Educate yourself by watching this: https://www.youtube.com/watch?v=NUQu-OPrzUc&t=137s