To reach the Ancient Elf Kingdom, located in the high mountains, passing through Ajia Land via the desert was a good choice for the Sects.
Although this road was not very safe, like when Prophet Noen crossed the desert years ago, if they did not take this road, they would have to take a much longer route through Nus to reach the Ancient Elf Kingdom. The Sect Priests estimated that this detour would take almost three years, whereas the direct route from Ajia Land would take only six months.
Moreover, most importantly, as the number of True Believers increased, more and more people traveled to the Holy Land to make pilgrimages. The desert, once fraught with dangers, had become much safer than before. With several more guides, as long as there were no major mistakes, they could definitely reach the Ancient Elf Kingdom.
After weighing all considerations, the Sects decided to pass through Ajia Land.