That is only your opinion. That is how I see it. Obstruction of justice is crime. Are you accusing watchtower of obstructing justice?
I would suggest that in some cases, probably a small minority historically, this could well have been the case if you were able to look at every example worldwide through the last 100+ years.
More realistically, I think that the evidence demonstrates time and time again that the culture of deference to organisational hierarchy, coupled with some mistaken view of protecting Jehovah's name publicly has repeatedly led to allegations of sexual abuse not making it to the authorities.
Where the WTS interpretation of how to handle the two witness biblical principle has prevented further internal investigation and action, the allegation still has not made it to the secular authorities.
In all of these cases justice has been obstructed to some extent even if not by wilful and criminal intent.