According to Osho, shraddha can never be blind; blindness belongs to belief and disbelief. Shraddha is the integrated, gathered consciousness that becomes an eye and directly sees (darshan). Krishna avoids 'vivek' because discernment is an individual, finite, fallible process, while shraddha is surrender into the Whole—oceanic, infinite, unfailing—where error is impossible. Hence the Gita emphasizes shraddha over personal reasoning.
True faith is seeing with your whole self, while mere believing or denying is blind; Krishna chose faith over clever thinking because thinking is small and can err, but surrendered wholeness sees clearly.