The fact remains, however, that we regular people have "the flesh" to deal with because we do have earthly fathers who are descended from fallen Adam and so our instinct is to rebel. We are, however, alive to God in spite of this fleshly condition and are only cut off from God when we choose to rebel against Him and sin (Romans 7:9).
Romans 5:12 Therefore, just as through one man You' and death through sin, and thus death spread to all men, because all sinned— 13 (For until the law sin was in the world, but sin is not imputed when there is no law. 14 Nevertheless death reigned from Adam to Moses, even over those who had not sinned according to the likeness of the transgression of Adam, who is a type of Him who was to come. 15 But the free gift is not like the offense. For if by the one man’s offense many died, much more the grace of God and the gift by the grace of the one Man, Jesus Christ, abounded to many. 16 And the gift is not like that which came through the one who sinned. For the judgment which came from one offense resulted in condemnation, but the free gift which came from many offenses resulted in justification. 17 For if by the one man’s offense death reigned through the one, much more those who receive abundance of grace and of the gift of righteousness will reign in life through the One, Jesus Christ.)
18 Therefore, as through one man’s offense judgment came to all men, resulting in condemnation, even so through one Man’s righteous act the free gift came to all men, resulting in justification of life.
Adam's sin had consequences that needed dealt with and God did deal with them at Calvary. Thus, to whatever extent death is passed from father to son, Christ fixed that with His own death. Therefore, God, knowing that Calvary was coming, only ever held / holds people accountable for THEIR OWN SIN (Ezekiel 18), not Adam's.
