The golden ratio is what it is. We cannot go backwards and assert that it proves that someone created it to be 1.618 and not 2.4 or 3.8. The fact that φ=1.618 favored the emergence of life, does not prove that someone 'made' that ratio for us.
It's like the story where amoebas grow in a shallow pool created by an accident (on the highway for instance) and say one to another "Look! If that pool was smaller we couldn't have grown in here, and if it was larger other predators would have eaten us. It's exactly the right size for us to grow. Thus, a creator has built this pool for us."
One could just as well argue that an infinity of multiverses jumped out of quantum vacuum simultaneously with our own 14Bya, with each having a different set of values for universal constants. We just happen to live in the one (or one of the worlds) where the constants like φ enable the emergence of life.