Without consequences for illegal behaviour, there's no incentive for bad actors to not continue acting bad. This, in no small part, explains why we are where we are today - a misplaced attempt to 'move forward' by ignoring illegal actions.
Without holding those who do wrong to account, positive movement will always be dogged or straight-up negated by those who do wrong without facing justice.
That'll only work here if there are reforms to the pardon power while we're at it. Any convictions a Democratic administration manages to obtain will be pardoned the next time a Republican gets in.