Well, at least until they’re 18. You are absolutely on the right track though it should be a lot longer. A human’s brainstem doesn’t fully connect to the frontal lobe, where logical thoughts are formulated, until around the age of 25.
Had we known this information 2 1/2 centuries ago, our US laws would be much up-to-date with actual “body clocks”. The legal age of drinking alcohol, possibly other laws, would’ve been set at a higher age. Can you imagine the public outcry now if congress tried to raise it now? Lol No way will any state attempt to raise legal drinking age to match this info of course- Mutinies and riots would break out in all states!