They’re not “indifferent”.
They simply cannot imagine it could be such a widespread, institutionalized, and endemic problem in “God’s Exclusive Earthly Organization”…
…but more importantly…
…the WT leadership knows that the more the Org’s CSA problem is exposed, litigated against, and confirmed by internal documents, which become a matter of Public Record (especially if such records name actual Governing Body members)…
…that all-important premise becomes almost impossible to maintain.