DY:
Questions “lekanter” are not real questions. They require responses, but not necessarily answers. Regardless, for one’s own emunoh, one needs to have the answers or to go look for them. Maybe the questions that are asked “lekanter” are issues the rebbe, teacher, or parent needs to explore, and Hashgochas Hashem placed that before them to do just that.
Being involved in the issue, it is rather clear that most questions are not truly “lekanter”. Rather they are an expression of pain and rejection that is being converted into an intellectual question. The judgment of “lekanter” is quite often inaccurate, and is (as would be discovered in a true cheshbon hanefesh) the adult’s own defensiveness. In fact, nearly all “rebellious” behavior is actually an expression of pain, not true rebellion. The Kotzker stated that the true “Apikores” is a rarity. Most are simply using intellectual sounding issues to justify fulfillment of their own taavos.