Jenner says transgender girls in women’s sports is ‘unfair’ Jenner is a joke candidate for governor. I don't think even reasonable conservatives want the Kardashian organization running the state. While true that Jenner helped make trans issues mainstream, the LGBT community is not monolithically a fan of her takes, so we shouldn't give her the power of spokesperson, just like Jesse Jackson shouldn't be taken to speak for all Black people. I find Gen Z as annoying as anyone else, and I think you touch on this cultural phenomenon where it has become cool to overstate one's "harm and trauma" because of the narrative where you're either oppressed or an oppressor and nobody wants to be seen as the latter. That said, I don't think it's a thing that people are faking being trans or gay to be cool. In fact I had a coworker once respond to that line of questioning with "Wait, do you think I chose to ruin my life?"
You're thinking of Dr. Rachel Levine and an exchange with Rand Paul at confirmation hearings. Paul went down this line of questioning, Levine declined to engage, and Newsmax filled in the silence. I don't know Dr. Levine's personal opinion, but today's general medical advice in younger children is to not necessarily "correct" gendered behaviors, that is if a girl wants to play with trucks or a boy with dolls, whatever. In fact many children outgrow this at puberty. But some don't, so for adolescents, the medical advice can include fully reversible puberty blockers to buy time to figure things out or partially reversible hormone therapy. Typically, surgery would only be available to 18+ who have lived as that gender for at least a year under a doctor's care. An open debate not limited to LGBT issues is how much autonomy and privacy teens should have over the own healthcare. As with anything, there are wackadoo parents on both ends of the spectrum that take things to unhealthy extremes.
An interesting thing I've learned from trans acquaintances - the community is kind of split. Many, maybe even most, trans people want to simply pass a regular man or woman and go about their lives without, you know, being murdered. Most of these are quiet about it and don't want to be noticed so probably wouldn't dance their bait and tackle around a gym shower. On the flip, there are people who never want to be known as a woman, they want to be known as a trans-woman, loud and proud, which I suppose is their right. Just know that these groups often resent each other and when an activist makes a huge unprovoked scene, there is a big part of the community silently cringing and hoping you don't hold it against them, so maybe it's worth offering them that respect.
As for the sociopaths and psychopaths, they don't need to fake being trans to get into a bathroom or locker room. Predators, voyeurs, and exhibitionists have yet to be stopped by signage and social norms.