You are free to form your view whatsoever.
I can appreciate that it is difficult to tell a person's gender online as there are scant or no direct physical evidence available. Even if I post a photo of myself here (which I will not given the dangers of online psychopaths), there will still be allegations of fakes and forgery.
Time and history of posts will usually tell, though they are still secondary and circumstantial evidence.
Nonetheless, jumping to conclusions about my gender is a folly at this stage.
Have a nice day