The Genesis Creation isn’t the only creation in the Bible. There is also the re-creation, at the Second Coming, when God will transform mortality into immortality
“in a moment, in the twinkling of an eye, at the last trumpet” (
1 Cor. 15:52, NKJV). If, however, God can do this instantly at the re-creation, why would He use billions of years for the first creation, as theistic evolution teaches?