Ug! I’ve suffered for 46 years because of this ignorant belief! In grade school, psychological testing always showed me as “potentially gifted.” They were doing such tests because I performed so badly in school, but seemed capable of better performance. School officials always used my “potentially gifted” status to emotionally abuse me. “If you try harder, we can get into classes for gifted children. They don’t let lazy kids in there.”
You have no idea how much pain and regret I have to this day. No, I never did get into those classes, and my academic success never improved. Luckily, I *was* gifted and just learned things on my own.