The fine-tuning necessary for life to exist on a planet is nothing compared with the fine-tuning required for the universe to exist at all.
Which in turn is nothing compared to the fine-tuning required for god to exist, who by definition is even more complex.
there are more than 200 known parameters necessary for a planet to support life—every single one of which must be perfectly met, or the whole thing falls apart. Without a massive planet like Jupiter nearby, whose gravity will draw away asteroids, a thousand times as many would hit Earth’s surface. The odds against life in the universe are simply astonishing.
And yet it is not impossible that there are other planets supporting life, since the universe itself is so astonishingly large.