Most of the time, I think people see what they want to see.
If you want to have male/female arms, you will likely see them as that.
I don't think any of the physical matters, and most of the time, it's just the result of insecurities showing themselves as an attempt to grasp excuses for the individual's struggles. In this case, a transsexual woman trying to convince herself that she is female, coming up with nonsense theories to prove or disprove others' femininity or masculinity... A truly secure person would never come up with this nonsense. To me, this woman's words are completely caked in elitism and an underlying insecurity. The pictures she has of herself? The proof. None of us should give her faulty reasoning even a moment of our attention.