If he somehow did pick up on that concept, in some sort of abstract, theoretical way, his basic nature still makes it hard for him to apply it. Undiagnosed and unmanaged ADDers are particularly prone in this conflict between responsibility and restlessness. ADDers, being the diverse and imaginative group that they are, deal with these facts of life in imaginative and diverse ways. Some just give up. This is sad to watch as a gifted person becomes defeated and a part of them deep inside is put to death.
ADDers are usually in a constant state of flux.
Many change jobs constantly. I know of one ADD man who had 22 W-2 forms in one year. Or they begin to work on legitimate opportunities, only to get distracted before the income actually starts to materialize. They seem to have a difficult time in determining what is realistic and what is not. This uncertainty can destroy marriages.