Considering the fact that he campaigned on releasing it, then did a loud reversal instead of just quietly sweeping that campaign promise under the rug with "lock her up", I think it's more like a demonstration of how controlled he is.
But but but Ghislaine said he was nothing but a gentleman! See? Case closed! The paramour and COO of Epstein and his sex ring said something and we all need to believe it because of her clearly-superior moral character.
What other reason is there? It's an admission by omission.