Because CS is not the problem. The problem is the sinfullness of human pride, lust, deception, greed, and plain evil.
As frustrating as it is and this frustrates me in civil and criminal law as well at time, any simple steps do have to respect the due process of the accused and the presumption of innocents.
It is hard to stomach I know. But I personally want no guilty party to have a ground for appeal based on sloppy leg work and abuse of the above. When convicted whether under canon or criminal law I want the conviction to stick. I want the penalty to be the highest allowable under law. Yes I know justice must be tempered by mercy but I think mercy is not hindered by appliation of right justice.
CS is part of the problem because it tries to hide the corruption and raping of children and keep it in-house, away from the prying eyes of family, teachers and police.