Be sure of your diagnosis
After many years in education I have seen students mimic symptoms of ADD and ADHD because of learning struggle. I often question if it is the chicken or the egg. If your child is behind and struggling in school then it is very difficult for them to engage in the classroom so they won't. I would be sure that I am very aware of any academic struggles they are having and find some help addressing them as you are looking at treatments.
I think you make an absolutely excellent point! Love everything about what you said.