Only the law creates the need for a priest. No law = no priest required.
Abraham had a relationship with God by faith without any earthly priest. The entrance of the law is the catalyst that then produced the priesthood.
BereanRuss:
What about Melchizedek, King of Salem and Priest of God Most High, who met Abram?
Then one who had escaped came and told Abram the Hebrew, who was living by the oaks of Mamre the Amorite, brother of Eshcol and of Aner. These were allies of Abram. When Abram heard that his kinsman had been taken captive, he led forth his trained men, born in his house, 318 of them, and went in pursuit as far as Dan. And he divided his forces against them by night, he and his servants, and defeated them and pursued them to Hobah, north of Damascus. Then he brought back all the possessions, and also brought back his kinsman Lot with his possessions, and the women and the people.
After his return from the defeat of Chedorlaomer and the kings who were with him, the king of Sodom went out to meet him at the Valley of Shaveh (that is, the King’s Valley). And Melchizedek king of Salem brought out bread and wine. (He was priest of God Most High.) And he blessed him and said,
“Blessed be Abram by God Most High,
Possessor of heaven and earth;
and blessed be God Most High,
who has delivered your enemies into your hand!” And Abram gave Melchizedek a tenth of everything.
Genesis 14:13-20 ESV
Please Note that Melchizedek met Abram (who became Abraham) BEFORE the giving of the LAW. This from
Psalm 110.
The LORD says to my Lord:
“Sit at my right hand,
until I make your enemies your footstool.”
The LORD sends forth from Zion
your mighty scepter.
Rule in the midst of your enemies!
Your people will offer themselves freely
on the day of your power,
in holy garments;
from the womb of the morning,
the dew of your youth will be yours.
The LORD has sworn
and will not change his mind,
“You are a priest forever
after the order of Melchizedek.”
Psalm 110:1-4 ESV
And, This from the Epistle of the Hebrews, also about our Lord:
So also Christ did not exalt himself to be made a high priest, but was appointed by him who said to him,
“You are my Son,
today I have begotten you”;as he says also in another place,
“You are a priest forever,
after the order of Melchizedek.” In the days of his flesh, Jesus offered up prayers and supplications, with loud cries and tears, to him who was able to save him from death, and he was heard because of his reverence. Although he was a son, he learned obedience through what he suffered. And being made perfect, he became the source of eternal salvation to all who obey him, being designated by God a high priest after the order of Melchizedek.
Heb 5:5-10 ESV
If you had properly been catechized when you were a Catholic, you would know that, when a priest confects the Lord’s Body and Blood in the Sacrifice of the Mass or gives Absolution in the Sacrament of Penance/Reconciliation or Anoints someone in the Sacrament of Healing/Unction, he acts in persona Christi, in the place of Christ.
And, what do you do with this from St. Paul the Apostle?
Now I rejoice in my sufferings for your sake, and in my flesh I am filling up what is lacking in Christ’s afflictions for the sake of his body, that is, the church, of which I became a minister according to the stewardship from God that was given to me for you, to make the word of God fully known, the mystery hidden for ages and generations but now revealed to his saints.
Colossians 1:24-26 ESV
Your Brother and Servant in Christ, Michael