The Universe Is Too Improbable To Happen By Chance
During my time as an evangelical Christian, and later after I became an atheist, I've routinely heard Christians argue that "The odds of the universe being the way it is by chance are only 1: [Insert some large number here]. There's no way something like that could've happened by chance. Ergo, the universe must have been created by a deity. Therefore God exists." I've even heard some Christians try to claim that anything beyond "1:1*10^50" is "mathematically impossible" so the universe absolutely would've needed a guiding hand.