[Resettozero]

Because it's powerful protection against the errors of the Nesotarians. Has been since the Coucnil of Ephesus in 432 AD.

Well, that's an answer I guess. So the RCC is still fighting the Nesotarians and that's why you need powerful protection against their errors?

What does any of that have to do with repeatedly calling to Mary as 'Mother of God'?

Like, I said, I cannot get a clear-cut answer to my question that pertains to a repetitious practice of virtually all RCs.

[Legatus]

So the RCC is still fighting the Nesotarians and that's why you need powerful protection against their errors?

There are people right here in the RF who deny the divinity of Our Lord, nevermind the mormons. There are arians and nestorians still running around today, their Christological errors must be refuted.

[NeoCaveman]

Nesotarians denied the divinity of Christ.

The title of Mother of God clears that up in no uncertain terms. Since the fifth century.

That’s the beauty of Catholicism we don’t need to reinvent the two thousand year old wheel. Or reverse engineer it from a text.