I love what you bring out about the Big Bang being fiction and imaginary. Thanks. But you've got some assumptions going that just aren't correct when it comes to "Creation." You have swallowed the fiction that Creation took place all at once, and that's not what the Bible has to say about it!
The Bible teaches an infinite universe, made by an infinite God who created everything we see and even that which is too far away to see. He has always been the creator and He has always existed, so it follows that the greater universe is in fact infinite in extent and time.
What the theorists are "loathe" to accept is that God exists at all, and they assume that they can on their own figure out God. God creates when and where He chooses, for His own reasons and that means that we can't study the stars and galaxies and assume we now understand them and know their purpose and life span!
Some of those stars out there have inhabited planets around them, which God created, and when He creates an inhabited world, He will not let that sun take the route that other suns might take. It won't explode after some period of time because it belongs to an inhabited place.
Our sun won't run out of fuel and blow up either because this is an inhabited planet, and God has plans for this planet (which He has told us about), and for those who will open their heart to hear His word, and ask for understanding. Those who follow Him, will eventually be able to travel the universe and literally see these far away places and visit other created beings.
God's account of creation matches to the infinite universe because He made it and has been making it forever. He allows and encourages us to study it to learn more of who He really is. Then He wants us to rejoin Him, so He sent His Son to die for our waywardness and blindness.
The tales taught by Bishop Lemaitre's writings and many thousands of others are humanly imagined ideas which depart from the Bible record. He and many others in those years had little knowledge to work from and they made some guesses which sounded good to them, but they were false. Today we are seeing that there is proof of those errors, and the infinite universe, which has always made more sense, is becoming more visible.
If we continue to imagine a randomized and accidental universe, we will continue to fail to see or understand the Creator who made us and who made that universe. He invites us to join His family and go live where we can learn the real facts, without the "Swiss cheese" like holes in our knowledge. He's got the knowledge and wants to share it. He understands what it takes for billions of inhabited planets to get along peacefully. Earthlings have never known such peaceful coexistence, nor have we embraced the laws which insure it.
Keep writing about the infinite universe, but don't throw out Creation on the basis of the fiction you've heard about it. You don't want to accept the BBT (because of the false theories), so why accept fiction about God?