In addition to having trans family members and trans best friends, I am also trans.
So you think having a trans mother makes you know more than an actual trans person on trans issues? Why? How does having a trans mother mean you know just as much as me about being trans?
What do you think your mother would think if you told her that you know more than she does about trans issues? Have you told her that you know just as much as she does about her life?