And populate the universe with copious evidence that it's a very, very old place?
True, God could do that. God could have created a universe a mere 6,000-odd years ago, and created it indistinguishable, on day one, from a universe that was billions of years old.
But wouldn't that make God a liar, trying to ensnare man with false yet irrefutable evidence of a past which had never occurred?
I don't believe God can be a liar. I think that the convincing evidence he left pointing to a very, very old universe means that it is an ancient universe, and that a literal-minded reading of Genesis is wrong.
ISA 65:17 For, behold, I create new heavens and a new earth: and the former shall not be remembered, nor come into mind.ISA 66:22 For as the new heavens and the new earth, which I will make, shall remain before me, saith the LORD, so shall your seed and your name remain.