Does the need for reconciliation mean that prior to their disobedience, Adam and Eve were in harmony with God? Once they had disobeyed, the harmony was gone... and a reconciliation was necessary in order to move again toward God.
Adam and Eve disobeyed and were then out of sync with God. They were dead and, of course, He was Alive. They had lost Life itself, so they did not have the price of their own redemption, the price of reharmonizing with God, the means to reconcile themselves once more with God.
Because in losing their harmony they lost Life itself, they could not regain what they had lost. A sacrifice was needed, a sacrifice of something Alive... but who was worthy? Who was Alive? Not one man in the eyes of God!
Who but God could it? Why did He set things up that way in the first place?
"And he said, Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell thee of." Gen 22:2
"And Isaac spake unto Abraham his father, and said, My father: and he said, Here am I, my son. And he said, Behold the fire and the wood: but where is the lamb for a burnt offering?
And Abraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together." Gen 22:7-8
Did God through His Son do for us something we, being dead, could not do for ourselves? We were dead and dead sacrifices were and are unacceptable! But then once a person has taken hold of the Life, which Jesus made accessible through the Holy Spirit what does that person need to do?
See what Paul wrote here:
"I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service." Rom 12:1
If we are not Alive, as God counts being Alive, is any sacrifice by us meaningful to God? What would it, the sacrifice of a dead man, accomplish?