I have no idea what Mr. Jenner's motivations are. Perhaps he wants to be a courageous trailblazer, although Dr. Renee Richards carried some of this mantle many years ago. Perhaps Mr. Jenner is motivated largely by sensationalism and the associated revenue that comes from that. I have no way of knowing.
As far as this child is concerned, we have to remember that kids post their every thought and activity on social media. (Which as we know is unbelievably dangerous). This child was no exception. I don't think they were necessarily sensationalizing, I think they were just doing what kids do with social media. Sharing every detail of their lives.
I really don't expect everyone to understand or have sympathy for this child. I live in an area of the country where children like this flock to, to belong. San Francisco has long been a haven for the disenfranchised. The homeless rate for gay, transgender, transsexual, kids is so high. The abuse and trauma they endure on the streets is heartbreaking.
I guess because I'm used to seeing people who live different lifestyles than I do frequently, I don't consider it "different" but perhaps "authentic" for them. Whether it's "right" or "wrong" is between them and their God. My God tells me to love them with a mother's heart. Speaking of hearts, I try not to be influenced by what's on the outside (although sometimes it can be hard), because I might miss what's on the inside. That would be a shame.