It's nice to see an article that examines this critically and isn't just a vitriolic hit-job on people who are in this zone.
I'm the mother of a middle class non-binary kid myself, and I'd say there's a lot of truth in this, but there's also no shortage of people of colour who are non-binary and friends working in schools in 'rough' areas have reported trans kids too. There is I think, a big difference between what I'd call the 'happily trans/NB' and the 'unhappily trans/NB'. The former, like my oldest, are perhaps overthinking things a tad, and yes, tend to have the luxury of doing so, although I think overall we will see more non binary people in the future and perhaps I'm just old and don't really get what it means to young people. This generation is tending to see things through the 'lens' of gender, including some normal feelings of adolescence. I don't think this is much of an issue with the 'happy' cohort like my oldest and some of their friends - none of them seem interested in any kind of medical transition at all, they're just enjoying it a bit like I enjoyed being an 'indie kid'. And it's not actually a bit deal, it's not like they all venerate trans kids as stunning and brave, it'll be like my oldest comes home and says 'X has said they're using he/they pronouns now' and it's like, I dunno, they bought some new shoes. They claiming 'oppression' thing doesn't seem that much of a thing either, although it is energising many kids to activism for more vulerable people, I do think middle class non binary kids appreciate that a trans girl has it much harder than they do, for example.
Re: the unhappy kids, that can be problematic. I believe some of them will be trans but obviously only a tiny% and it's going to get harder to tell who. Others could be kids who are finding adolescence challenging or have experienced abuse and when presented with the chance to literally be someone else, to just Do Something that changes who you are, that could sound attractive. I think it unlikely, when you look at the state of trans care in this country, that significant numbers will go through medical interventions when they shouldn't, but when identifying the issue, at the end of the day, statistically, the chances that the answer will be 'you are trans' over them being depressed, anxious, being neurodiverse, just having a difficult adolescence, having trauma etc are obviously small. Even if 10 times as many people turned out to be trans than revealed in the latest census, that remains the case.