I dismiss them as baseless theories because thats what the majority of your argument has been. Lots of assumptions with very little fact. And sealing jutsu is very different than ninjutsu hence it being a different sect of jutsu. And if the theory is correct, which i am arguing for, then no, she cannot use the clone jutsu. And once again, we dont know enough about Kushina to make any inferences on her abilities and those who possibly cared for her. Regardless if you think its a way out of the argument, i fully believe what i said about the plot having a lot to do with this scenario of Naruto not being able to pass. Obviously im not going to straight up argue with the manga but you cannot tell me you honestly believe that realistically looking at how the villages treat jinchuriki, that Naruto would have been denied and never would have become a ninja. It just doesnt make sense. Its a complete waste of what the villages measured as military power. Lastly, you have yet to show an Uzumaki using a ninjutsu which would entirely destroy the thread. Until then, the graduation argument is weak next to the insane amount of evidence supporting the fact that the sage, was indeed an Uzumaki.