I would argue this is a disingenuous argument because when you look at the appearance of a nightborne
MALE, the differences are much greater. If you noticed, the females in this game are given the laziest treatment.
For example, the zandalari female is a literal reskin of the troll female. You would not see any difference if they wore the same full armor despite having different dance animations. The only way you would know the difference is
if you already knew what they were from the beginning.
Otherwise, you would just think "that jungle troll has a cool dance" even though its one of the zandalari.
Animations make the LEAST difference in terms of creating differentiation between races, and in fact, it is one the poorest arguments to use.
Human beings naturally gravitate towards these two aspects.
1. Color
2. Proportions.
Animations are literally the LAST thing focused on in terms of design because it makes such a minor difference in terms of perception.
Disagree? That is fine, but science says otherwise
and games with different races that use the same animations also disagree with you.
Heck, even in the very screenshot you provide you can see the immediate difference in terms of proportions, as well as their ears.
Yeah, these changes may seem minor to you, but these minor differences are immediately present when you are looking at the model, and so they matter.
Aesthetics is an extremely important aspect, and this is why when you are present with different race options, you're shown how different they are right off the bat even though both zandalari female troll and jungle female troll use the same standing pose.