This is fanon.
And not a strong one, keep in mind that Durga is at this point where it not worn by Anna would be a puddle of exotic materials, it's clearly had no trouble creating whatever it needs for development in the past.
The competing fan theory is what Radvic said, that Durga is optimising Annas body for a more social environment.
Following this it's unlikely that we'll ever be the same height again as even if we flew straight to Africa to pitch in in the bloodiest most unstable warfront there is, we'd be doing it as part of a flight in the command structure so there'd still be more social engagement than in Africa.
However keep in mind that any answer relies heavily on unproven assumptions.