Actually, that was not strange at all. Each of the top forces had an extremely strong foundation and a few old fogies who were stuck at a bottleneck at the peak of the Legendary-realm. Most of them no longer meddled with the affairs of their families and forces, and were instead focusing all their attention on breaking through the bottleneck. They would either step into the Sanctuary-realm and obtain thousands of years of life or stay in seclusion and quietly turn into a pile of ashes.
Back when Lin Li was a guest at the Brilliance Shrine, he had heard of a forbidden place in the Brilliance Shrine that was specially for those who were in seclusion to break through to the Sanctuary-realm. Due to the fact that no one dared to disturb them, it was unknown if the people who were in seclusion in that one room were alive or dead. Some might only have their corpses discovered decades or even centuries after their deaths.