The majority of kids being diagnosed as transgender would not 'persist' in being transgender if they didn't have money-hungry pharmaceutical companies pressuring them into 'early intervention' puberty blockers and cross-sex hormones. When you're diagnosing every four year old boy that puts on heels for a lark and every girl that doesn't want the burden of bra shopping and insisting both are trans you're obviously going to cast a very wide net.
The trouble, of course, is that you personal identity is something you develop over the course of years and so it isn't uncommon for kids to experiment with mommy's make-up or daddy's football. Or to feel like their changing bodies are weird and alien, with new gross armpit smells and stuff. Absent crazy transtrenders and given the support they need to ground themselves, 97% of kids with these issues get sorted after puberty - less than 3% actually persist to identify as trans. Tellingly, a sizable number of these kids with those issues grow up to be homosexual, at about 40-60%.
So in short say you have 100 kids that present with 'gender confusion' or 'gender fluidity'. Give them all supportive families and environments that assure them they can grow up to be good and functional adults and let them proceed through puberty. When you come back around at 19-20 years of age, you'll find; 50 of them will probably be gay or lesbian, 48 of them will be hetero-normative (maybe a little tomboyish or 'sensitive'), and 3 of them will go on to become transexual identifying adults.
Currently, however, the trans activists are insisting we stuff puberty blockers into and then surgically mutilate the whole lot of them. 97 innocent kids must be tortured for the sake of 3, even though we know this 'early intervention' doesn't deliver any positive long term outcomes. We don't even know the long term effects of these treatments, but the short-term effects are pretty terrible and don't bode well.
In 20 or so years this period of history is going to be regarded with great horror and shame.