I also suffer from ADD (non-H type). While I definitely acknowledge the validity of your point, having a view of the other side of the coin often helps to cope with these things. Not just cope, but moreso to keep in mind where we might best apply our efforts to have the greatest effect in our favor. It certainly helped me to have things reframed in such ways.
I think it's more a matter of degrees than a wholesale one view vs the other.