The whole notion of sanity may be an attempt to medicalize morality - to speak of the good in the language of health: to make us more accurate, more scientific in our wanting - but by the same token it becomes a form of moral blackmail. It is as if to say: if these are not valued - if these forms of wanting and feeling and speaking and doing - are not cultivated and encouraged and rewarded in the child, then the child will be mad.
I've been dyslexic and had Attention Deficit Disorder at some time in my life. I still read with a highlighter, but I've always loved to read.