That's just silly. So, based on your reasoning, the civil war did not happen because you did not see it. Since nobody actually saw OJ murder his wife, he was innocent of the crime. Because we can't actually see them, atoms do no exist.
Jesus' crucifiction cannot be a fact, based on your position.
Let me clarify. Not confirmed by a living eye witness!
There is NOTHING you can point to to confirm the earth is millions of years old. It is just speculation and conjecture.
I'm sorry if you don't like that fact!