Wang Lu might have traveled less, and less informed as such, assumed it was easy to enter the master realm. The number of master realm experts trust appeared in even a clan like the Wang clan every decade didn't reach fifty. If this was was the case, with such a large population, one could imagine the situation for the higher levels.
How could cultivation be a simple thing, and the most important thing was that no shortcuts could be taken to reach this stage.
Most of the descendants of the Wang clan reached the peak of body forging, the Human general stage.
Only a portion of them managed to advance further in the future, while most gave up and decided to enjoy themselves.
It was also the reason someone that had married into the Wang clan, such as Mei Lin, had so much authority.