From Hollow Earth, Mountain Furrow, and Rock Underworld's descriptions, Lin Yuan learned that the Earth's Sacred Fruit did not have any impressive capabilities.
It was only able to control the three of them because of its nectar. The three of them only found it difficult to break free of its control after they consumed its nectar numerous times.
Before that, the Earth's Sacred Fruit was nothing more than a treasure that the three of them had discovered.
If the three of them had known that the Earth's Sacred Fruit could take control of them, they would never have used so many resources to nurture it!
The Earth's Sacred Fruit needed earth-elemental energy in order to ripen. Lin Yuan had as much earth-elemental energy as he wanted. After he took control of the Earth's Sacred Fruit, he could enable it to ripen rapidly.