We don't deny this at all.
What WE deny is the way Rome wants MARY to likewise have a "Divine and Human Nature".
Elsie:
Well, if you believe that Rome and the Orthodox think that Mary as a Divine and Human Nature, then you are really misguided and 100% wrong. Nevertheless, the issue is who did Mary give birth to, a Divine Person or only a Human nature. Most of the Prots here will not answer that question or totally make claims that are explicit in many cases, Nestorianist Heresy