As if there are not well informed Catholics who leave the church and find they have a better relationship with Christ elsewhere.
I never read a convincing Protestant conversion story. The template is always
— The Catholic Church does not teach from scripture
— I was told that rituals and rules save me
— Now I have a personal relationship with Jesus and read the Bible.
A well-informed Catholic will never say such dreck. Sure people leave: the Church is an early-medieval countercultural, terribly demanding institution, while Protestantism caters to the modern middle class with utter servility.
But my point was much simpler than that — you said that the Church cannot change people’s minds and the presence of informed converts demonstrates otherwise.