What the old covenant of priest and sacrifice could not remove was your propensity to sin. But it most surely forgave certain sins. But only for as long as to the next time you sinned, because the sacrifice you made before is long gone now, and the priest who offered it may not be around anymore, either.
No, sins were covered, but not removed. Animal blood and the blood of the Son of God are not the same in efficacy, as if Jesus blood were no better than a goat's blood.
Once again, this is an end run to try and sneak OT definitions into NT theology. As if the forgiveness of sin in Christ were the same as having offered a bull.
Hebrews 10:1-4 LITV
1) For the Law had a shadow of the coming good things, not the image itself of those things. Appearing year by year with the same sacrifices, which they offer continually, they never are able to perfect the ones drawing near.
2) Otherwise, would they not have ceased to be offered? Because those serving did not still have conscience of sins, having once been cleansed.
3) But in these there is a remembrance of sins year by year,
4) for it is not possible for the blood of bulls and goats to take away sins.
Much love!