In Science, arriving at the truth of the matter, always matters.
If you were a DA putting together a murder case against me, it would matter a great deal to the jury if I had 40 minutes to drive across town and commit that murder and clean up the scene, or if I only had 4.
Cosmologists job is literally investigating and explaining how the universe developed over the years. Knowing how many years is kind of crucial in that effort.
Although it does matter how much time was involved, it becomes a meaningless question with God, because the length of time would not put any burden on God who is transcendent to time, space, and so on in our universe. Where the real questions come into place is without an agent with an agenda could any of this occur through any other means? We are transcendent beings in this universe, we can produce meaning by arranging the material in the universe so that it is recognizable to others.
That leaves but two possible causes for the arrangement in the universe itself and life was an agent involved? I am telling you how much time doesn't matter, when you write a paragraph and I can read it does it matter that it took you 4 minutes to write it or 4 years? The fact meaningful words were arraigned in any medium in the material world speaks to an agent with a mind.