Just because they fully developed doesn’t mean the argument they are presenting isn’t logical. It might not be, and that might be because they aren’t fully developed, but you would never know. You must treat every argument you hear as if were generated in good faith. Saying that you can’t rely on them to understand their own shortcomings in their own logic is inconsistent with the idea of logical debate in the first place. How would one ever know the difference between someone who is not convincible vs a non convincing argument. And the idea that young people should just adhere to values is not only inconsistent with the idea that the elders are more logical, since that is merely an appeal to authority, but also won’t be an argument that a young person will listen to, since in your own words, they are irrational.