The sin of Adam/Eve stands in stark contrast with that of their son’s, Cain.
The serpent talks the parents into sin. God can’t talk their son out of it.
God is absent in the sin of the parents. God is the object of worship that sets off their son’s death.
There seems to be no real human victim in the sin of the parents. Cain murders his own brother.
The parents reluctantly confess their sin and accept punishment. Cain does neither.
Look how easy the cycle of sin revolves. From temptation to flesh/world having a grasp on us. From blaming others to pure denial. From a “victimless” sin to one with grave consequences for others. From without God to even in front of God. Sin is indeed a cancer.