I'm pretty confident from my experience with contemporary kids and young adults off of the internet is that a lot of the troon stuff has to do with the unhealthy and obese. People like "Lea" Thomas are the aberration and not the norm for troondom. It's generally more about how fat people try to put a positive spin on their condition than it really is about Judith Butler going mainstream.
The majority of troons, as opposed to internet-visible ones, are for the most part people who are really physically unhealthy. It seems like an identity for people who are unable or unwilling to be attractive. In the past they would just be ugly people. Now, they "come out" as trans, and most put in no real effort, don't get surgery, and especially if they are female, don't put in the kind of obsessive effort into becoming a facsimile of the other sex that the internet propaganda would lead you to believe about it. It's not uncommon for every fat girl in a college class to have pronouns even though they are just fat. Fatness is the overwhelming reality of modern American life that tends to not get that much attention because people don't like looking at pictures of fat people.
It's kind of like the university/corporate propaganda version of Hispanic diversity portraying most of them as Telenovela actors and actresses, but then the reality is some mixture of white people with Spanish last names, Sephardic Jews, and 4 foot tall mixed-race Oompa Loompas, with most of them being like the last item on the list. The average troon is also like that: just dumpy and unremarkable.
This also translates to mediocre intellects and creatives who use troondom to try to make up for a lack of talent: unable to stand out on normal terms, they continue to be mediocre, but color their hair or go on a short course of hormones and then pretend that it makes them more worthy of attention. Generally, it doesn't work, but for the people willing to pretend to this halfhearted identity, they might be able to check some diversity boxes for their employer.