By changing the policy to delete all abusers, they would lose many appointed men.
By becoming open and sharing the abusers names to protect the congregations, they would be liable for compensation claims.
By making any changes because the law says so, they demonstrate themselves to be less than the holy all knowing GB they try to portray.
By doing anything on a worldwide scale, they would expose their underlying problem to many who are unaware of it, and some would quit.
Expensive court cases would follow, bad publicity, loss of followers and ministry zeal, and loss of income.