Accordinng to grover why did he say that the tree big gods swear to never have any more children?

In "The Tree Big Gods," Grover suggests that the gods swear to never have more children due to the chaos and complications that arise from their previous offspring. The conflicts and struggles among the demigods, as well as the challenges faced by the gods themselves in managing their legacies, lead them to this vow. This decision underscores the complexities of divine parentage and the desire for stability among the gods.