Hebrews 9:14 refers to how the blood of Christ "cleanses your conscience" from dead works. Guilt has been dealt with at the cross.
But there is a distinction between guilt and godly sorrow. Guilt comes from hearing the Law, and feeling condemned. Sorrow comes from hearing God.
There needs to be a distinction between guilt and sorrow. Sorrow is fine, because it is God putting His finger on something that requires a response. We might not feel guilt, but do we feel sorrow? We need to be careful that the denial of guilt doesn't turn into a denial of sorrow.
Note 2 Cor. 7:8-11 -- "…sorrow that is according to the will of God produces repentance without regret" (i.e., without guilt).