They wouldn't just be unconvinced; they'd think they have a brilliant future ahead of them, destined for invincibility, with no need to restrain their arrogance... That's why only someone like Xu Ke is suited to teach them. After all, what right or confidence would you have to claim you're invincible with a great future ahead after being put in your place by someone even younger? Your arrogance would probably be beaten right out of you...
Once that arrogance is hammered out, these geniuses will leap over the Dragon Gate and ascend to a new level. Then, the Northern Dragon Guard's strength will naturally soar.
Ki Qinyin had played her cards perfectly.
