The reason this concerns me so much is because I believe integration of feminine interests/impulses for men and masculine interests/impulses for women is a necessary step in psychological development for all people. The predominance of the 'opposite' gendered interests/impulses varies a lot between individuals, but it is still important for becoming a calmer and more put-together person. What they seem to be doing is corrupting this and making "gender non-comformity" into some thing that's unique to a certain part of the population, and, for that subset, doesn't actually require people to integrate masculinity/femininity. When you look at "GNC" people, all their "masculine" and "feminine" aspects aren't them becoming more comfortable with themselves but instead them putting on a show for everyone else. It's the exact opposite of what we should be encouraging people to do.