This was because all of these youths were all at the Bridge into the Dan Formation stages respectively, at such a young age, and that is why they are treated with so much respect within the sect that they are regarded as 'Elders In Learning'.
As a matter of fact, someone like Gu Jin for instance, who was the leading core court disciple had been at the Bridge for about six years now, accumulating and storing Qi so that he could form the sturdiest Dan possible.
This status also meant that they were already Elders in terms of everything else, apart from experience, and that is why they are being taught directly by the Grand Elders and the Sect Leader personally; a level of tutelage even Elder Yun would do anything to obtain.
They arrived at the city wall moments later as Elder Yun moved over to one of the Patrols on the wall;