The thing is whether they have male body or female they should have both sexes either way, that is what Futanari means. I dislike this new trend of calling Shemales/Trans, Futanari for they are not.
But I can see your viewpoint, i did not understand what a Futanari was until I started looking at the Japanese content, which is where Futanari originate from. I just find it annoying that the Author intentionally call them Futa/Futanari when they are not👍. It's a pet peeve of mine 😂