Because God is not in control of the Catholic church, not need he be. Sometimes men feel they know more than God and force Him out. The Episcopal Church suffered the same demise. And God probably smiles. He will always be in control as the many organized religions stray, God is constant. If you seek Him, you will find He is still there.
You are mistaken.
God is control of everything. He is omnipotent.
It is not up to us to question His permissive will.