The documentary maker has specifically chosen families in the American midwest where gender non-conforming people would have the hardest time, to show the sorts of struggles that they go through (such as the line between activism and exploitation), but one thing jumped out at me:-
"At seven, Avery, assertive about her gender identity as a girl since age four, is already a seasoned public speaker on transgender identity along with her Southern Baptist-turned-activist mother, Debi."
My little girl is nearly four and she is not assertive at all about her gender identity. She flips between gender conforming and gender non-conforming behaviours and presentation, like everyone else. She's beginning to be aware of sex and gender now but that awareness has very slowly come online, and she does make category errors still. Four is when they start being little sexists because they figure out more about how their society is structured but they're not experienced enough as thinkers to notice any nuances.
Seems to me it would save a lot of money on puberty blockers, cross sex hormones and surgeries if upbringings were a lot more low key about gender roles, and let the similarities between groups of people be more remarkable than the differences.
Obviously gender non-conforming children exist. I don't understand why it needs to be a big deal. Let them wear pink dresses or shave their hair or whatever. Why does that mean you need to become an activist for queer theory? Just let them be themselves without projecting adult hangups and prejudices.