What is the need or motivation for the supposed millions and billions of years?
It is to find natural explanations for the origin of the Universe, Life, Rocks, etc. These long age theories are motivated to get rid of the need for God. If there is a God, we are accountable to Him.
Evidence from science continues to show that these naturalistic theories are still not explaining everything well enough – they still need more time! (See this article titled Time – no friend of evolution: https://creation.com/time-no-friend-of-evolution. Also refer back to Tuesday’s post about the “Story of the Billions of Years.”
Ultimately, the Bible explains everything better!