In my own life, I've found that I have a hard time memorizing stuff that I don't care about.

"Distractability" is a negative symptom that doesn't speak to the real issue. ADD ADHD people can stay high focused but on stuff that is a good match for their interests.

Force them to memorize stuff they don't care about and the heart takes them in the direction they do care about.

It comes down to realizing that one's heart drives life, not society's plan for us.