I for one see no point in all this.Sure, I have assumptions about AT that come from my extensive ballroom + latin training, but as someone who dances in over fifteen styles, most of which I teach, I'm quite adaptable, and very eager to see (and understand) the differences, as well as the similarities.
Having assumptions is not the sole preserve of the 'ballroom' dancer (although there IS no ballroom dance), and some assumptions bear closer scrutiny than others.
As an ex ballroom dancer, no matter how disparaging you seem to be,
it's best to treat AT separately with different technique & posture.
It fits no classification, it wasn't designed to as it wasn't designed at all.
It evolved in the circumstances of the River Plate area.
Of course if you start drawing comparisons & introduce techniques that
you already know from ballroom, you are as guilty as any one of countless teachers
from other dance forms who bring their experiences, attitudes and styles to AT.
BTW, a lady in a typical ballroom poise, dancing AT in open embrace, might look a bit odd, but if she has the correct forward balance (common to both AT + ballroom), she will get on, just fine.
If I could be bothered I would challenge this.
I'll leave it with the comment that in my experience
ladies who dance ballroom quite satisfactorily can have
a real challenge when they try AT milonguero style.
And using myself as an example, it applies to men too.
Dancing the homogenised, so-called elegant stepping VU/modern Tango
then you can get away with almost anything. But it's not my tango.