This signified that the way into the Holy of Holies in heaven was made possible to ALL MEN THROUGH THE BLOOD OF CHRIST (Heb. 9:8, 10:19-20). ALL have access to God now, without priests. (Acts 2:21; Rom. 10:9; Eph. 2:17-18).
How simple is THIS to understand? We don't NEED priests. Our body is the Temple of God. Christ is IN US. And we are IN HIM.
Two issues with that:
1) None of the three versus you referenced say anything about priests or direct access;
2) Catholic Priests do not impede anyone's access to God, they in fact educate, support and facilitate that access.
Hebrews 7:23-27 Now there have been many of those priests, since death prevented them from continuing in office; but because Jesus lives forever, he has a permanent priesthood. 25Therefore he is able to save completely those who come to God through him, because he always lives to intercede for them.
Such a high priest meets our need—one who is holy, blameless, pure, set apart from sinners, exalted above the heavens. Unlike the other high priests, he does not need to offer sacrifices day after day, first for his own sins, and then for the sins of the people. He sacrificed for their sins once for all when he offered himself.
Hebrews 9:23-28 It was necessary, then, for the copies of the heavenly things to be purified with these sacrifices, but the heavenly things themselves with better sacrifices than these. For Christ did not enter a man-made sanctuary that was only a copy of the true one; he entered heaven itself, now to appear for us in God's presence. Nor did he enter heaven to offer himself again and again, the way the high priest enters the Most Holy Place every year with blood that is not his own. Then Christ would have had to suffer many times since the creation of the world. But now he has appeared once for all at the end of the ages to do away with sin by the sacrifice of himself. Just as man is destined to die once, and after that to face judgment, so Christ was sacrificed once to take away the sins of many people; and he will appear a second time, not to bear sin, but to bring salvation to those who are waiting for him.
Hebrews 10: 8-14 First he said, "Sacrifices and offerings, burnt offerings and sin offerings you did not desire, nor were you pleased with them" (although the law required them to be made). Then he said, "Here I am, I have come to do your will." He sets aside the first to establish the second. And by that will, we have been made holy through the sacrifice of the body of Jesus Christ once for all.
Day after day every priest stands and performs his religious duties; again and again he offers the same sacrifices, which can never take away sins. But when this priest had offered for all time one sacrifice for sins, he sat down at the right hand of God. Since that time he waits for his enemies to be made his footstool, because by one sacrifice he has made perfect forever those who are being made holy.