Ultimately it feels like a wise retcon for the film to make (recent comic book versions of the character have done this as well) as it acknowledges the bizarre original origin story for Diana while also framing it in a way that’s far more palatable for mainstream audiences.
When Diana Prince was first introduced to DC Comics back in the 1940s, her true origin was considerably weirder than the current incarnation.
Wonder Woman makes direct reference to this particular origin story but reframes it as a bedtime story told to a young Diana by her mother.
In the earliest depictions of the classic heroine, she was sculpted from clay by Hippolyta and brought to life by Zeus.