Sect Writs were writs that encouraged people to join Sects, and they gave support to Sects to develop. Sects were the best places to nurture top-tier experts, as most experts in the world came from Sects. As such, it was important to greatly develop Sects.
Whether it was the management or structure of Sects, it was best to set them up like ordinary Sects. Moreover, it was better to start nurturing disciples from as young as possible, ideally below 16 years of age.
Zhao Fu had only started cultivating after entering the Heaven Awaken World, and his Cultivation had fallen behind most people his age. This was the case even though he had Heaven grade aptitude, and without it, he would have fallen behind even more.