The only meaning I see in this story is that God's "imperfect" creation has a keener sense of justice and empathy than their so-called merciful God.
God did not create Adam & Eve with a fully developed brain. They were like children whose cognitive development was incomplete so their brains were not able to perform certain functions such as distinguishing between right and wrong. They were also like the animals in this sense.
Yet, despite their being created without moral sense, we are told that God did not forgive them. He blamed them, and their billions of descendants anyway, demanding the ultimate penalty many times over.
This contrasts with courts around the world which show mercy to those who do not know right from wrong. A "Not Criminally Responsible" designation is a fundamental principle of many justice systems. Accused persons must have the capacity to understand that what they did was wrong - otherwise they cannot be found guilty of an offence; such persons are not fit subjects for retribution or punishment.
Children who commit wrong cannot be prosecuted as they are under the age of criminal responsibility.
In the U.S. brain science has been reforming juvenile justice policy and practice. They have abolished the death penalty for crimes committed during adolescence, found mandatory life-without-parole sentences for murder in violation of the 8th Amendment, and eliminated life-without-parole sentences for crimes less than murder. Opinions have started to change, providing the opportunity for reform and rehabilitation of juveniles.