Edit for context:
My view is transracial isn’t valid and this person is trying to dogwhistle. I’ve already blocked this person, and now they’re going after my friend saying my friend is transphobic because they disagreed with them about transracial being a thing (they’re purposefully leaving the context out so my friend looks transphobic when what my friend really said was transgender is valid but transracial isn’t)
I feel like your over focusing on the medical aspect
I took to mean like how you compare say breeds of dogs. Both a golden retriever and a German Shepard are both dogs,.both k-9 members of the space species.
All fo them have the biological ability to be both male or female as it’s a secondary trait controlled by hormones.
While race is basically genetics and your DNA. You cant just edit your DNA and rewrite your body to express characteristics of another race.
You can’t just make your body suddenly become a red head, or grow an afro. You can’t just suddenly force your nose or cheek bones to rearrange themselves.
You can’t just shrink to lengthen your bones.
Most of what makes up human “races” is just the breeding of our ancestors.
In the future we may be able to change all of this and custom design out bodies. But that wouldnt be a natural change unlike hormone therapy.
Instead of taking advantage of a natural ability of the body, you would be entirely overruling it and entirely creating something new that isn’t natural.
Basically you would be performing eugentics. For good or bad.