It does matter.
I get what you are trying to say, but it matters because the narrative of the Earth being millions or billions of years old runs into conflict with scripture. Creation week described in the book of Genesis took place over the course of 7 days, each 24 hours long (7th day God rested) and since then biblical scholars estimate the age of the Earth to be roughly 10,000 years old by adding up the ancestry ages the Bible shares and inserting them into historical events we do know the date(s) of.
It isn't that the literal age of the Earth matters, it is the direct inferences that such dates would convey. I recommend two books if these topics interest you:
- The Lie: Evolution (by Ken Ham)
- Creation: Facts of Life (by Dr. Gary Parker)
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.