Thank you for your question ☺️

Being Nonbinary if I'm remembering correctly from the days when I believed in the Pride stuff is being not gender binary or thinking you don't feel like or conform to one specific gender while you can also feel like both at times,They/them.

OK! With that out of the way,I think being uncomfortable in your own skin is completely fine it's a part of growing up. When I was 13-15 I was SO insecure and felt like I was different and weird and that nobody would ever understand me. But that's the lived experience of almost every teenager. So when someone decides to confuse a whole generation of children by saying that everything they're feeling Does mean they're different and they actually don't have a gender,I think that's a way of perverting the body God gave us.

For the kids who believe it I understand them pretty well but Just because you feel something doesn't mean its true. God made Man and Woman,if he intended for there to be more then he would've made more,but he didn't.

Now with all of that said,As a Female white girl who Grew up in the ghetto of Tucson there were times I had to dress as a man to go to the store to prevent the Illegal Trafficking gangs from kidnapping me,it didn't once cross my mind in that situation "Does this make me both genders? Or no gender?" I understood the situation pretty well if.you do start thinking that in that situation then I'd argue you're worrying about the wrong thing Honey. It doesn't sound like your sister's friend genuinely thinks that though,the way you phrased it leads me to believe she's doing it the same way I was. So I guess

NONBINARY= (Insecure kid who needs guidance)

Girl dressing up as a boy to survive doesn't = (Nonbinary)

I hope that clears things up,Also Sorry I'm not really good at answering questions I hope this wasn't confusing 😣!