I think on one hand you've got a point. Although I don't agree it's necessarily anything to do with parents having high paid jobs. I think it's more some teens feeling they're not getting the attention they feel they deserve from their parents combined with a dollop of old fashioned teen rebellion and social contagion.
Also, I agree, some parents do made it more about them and their identity as someone 'having a trans child' (famous examples being the Tennants, D and C Grant who actively look to 'cash in' on it under the guise of interviews about their lives/struggles, photo opportunities etc
However, I think there are far more children who id as trans who are vulnerable/on the spectrum as well as those who are suppressing or being coerced into suppressing the fact they're gay or lesbian.
There is also evidence that children who have been sexually abused are more likely to Id as trans. I find it particularly concerning that this isn't considered more about trans id children.
I don't know any m 2 f trans id children (imo m2f is more common in adults, often for completely reasons if you get my drift), but I've come across about 5 f2m/nb teen girls and I'd say most if not all fall into the on the spectrum cohort.