With SpOck's retractable claws, we seem to be headed in that direction. Do you think the storyline will ultimately provide us with a clear answer, and if so, what do you think the answer will be?
Maybe Peter worried that the powers were too dangerous, so he had someone like Dr. Strange bury them in his unconscious mind where they would only surface if he absolutely needed them. SpOck doesn't care if they're dangerous or not, so he can access them at will.