I didn't get that at all. The article never called it a white man's invention, or said you have to say you're two spirit even if you're gay or because you're gay.
From the article:
Jaxin Enemy-Hunter, 28, who helped Mr. Bane with last-minute stitching on his moccasins, found it rewarding to see people who were not raised in the Two-Spirit tradition embrace it, but their journey was not his. Growing up on a Crow reservation, he had been singled out early by his great-grandmother and given a double helping of education: studying with the boys and then studying with the girls when the boys played. He described the experience as both high status and extremely stressful.
The article even says that some tribes see Two Spirits not as any type of orientation but as a role in their community......the prejudice against the two spirit and LGBTQ Native Americans
are Christian influence, that they did say.