And the Catholic church apparently ignores the extra-biblical documents which do not support their case. As for not saying one way or the other, please tell me how one is to interpret the passage. Do you propose infant confirmation classes? And how do we know that they're retaining what we're teaching them? Should we give them a test? And if they can't speak, what sort of test would that be? You can't just say, "It doesn't say." Because the implication is quite clear. It just doesn't fit your box. Sorry.
I believe the Orthodox do perform confirmation at the same time as baptism.