But the Lord Jesus is our high priest.
This is begging the question.
As I said later in the post you truncated, "priest," and the various forms of the word, shows up NOT ONCE in any of Paul's epistles.
He's Israel's High Priest. You know, Israel, the nation that 1/12th of which is literally comprised of priests.
Again, Paul NEVER ONCE mentions the word. Paul the one sent to the gentiles, who calls Christians "neither Jew nor Greek," which means there are no priests.
13 of the 27 books (nearly half) of the New Testament were written by Paul.
And yet, including Paul's Epistles, 18 of the 27 books don't contain any mention of priests or priesthoods, especially that of Israel's.
In other words: Of the mere third of the books of the NT that DOES contain references to priests, ALL of them are books addressed to Israel, and as mentioned above, most of those references are directly related to Israel.
That's how 1st Corinthians 15:3 works, " ...Christ died for our sins according to the scriptures...,"
Which doesn't relate to Jesus being a High Priest, does it?
His death was a sacrificial offering (upon the 'altar' of the cross) to the Father on behalf of His Body, the Church. It was 'priestly' what He did.
You're trying to make a connection that isn't there, Idolater.
There is nothing "priestly" about Christ dying on the cross, as not one of the priests of Israel sacrificed themselves for any sin, and in fact, God forbade human sacrifice!