Think about the essence of a True God and a Venerable: to gather the fortune of a race, making billions trust in themselves, becoming the savior in the hearts of billions!
Simply put, isn't it about making an entire race worship you blindly!
So here's the question: why would someone at the Absolute Pinnacle of being a demigod, with roughly equal strength and the highest status in their race, get trusted as "Venerable" while others do not?
Isn't it because the "Venerable" knows how to show off and promote themselves?
If an Absolute Pinnacle demigod silently kills enemies on the domain battlefield without promoting themselves, would the common populace know them, or even believe in them?
Common people might not even know who they are...
Therefore, while strength and achievements are important, so is the art of showing off and self-promotion.