The rise of Troonism and its comorbidity with obscene sexual deviancy is an odd beast, but I can break it down pretty simply, if you'd like.
The reason so many people adopt Troonism these days is that it's a zero-effort way to not only avoid responsibility for your actions, but that it makes you fundamentally impervious to criticism on Social Media. For people like Yaniv, this is a big appeal, since it covers up any impropriety you've been caught in in the past. This is when they aren't just doing it to indulge their sick fuckery, like say, Zinnia Jones.
And make no mistake: this appeal is fucking ridiculous in the sheer level of asshattery it permits you to conduct on Social Media. For all intents and purposes, you can do no wrong if you claim to be trans, with only the most toxic and insane Troon activists ever getting meaningfully sanctioned by the establishment. You can flat-out assault people, get arrested and even fined, and the Social Media platforms will happily tamp down on the people you assaulted for daring to criticize you.
Even if you manage to be the rare asshole who is such a pain in the ass that even Twitter decides you're persona non grata, however, even the most toxic troon activist virtually never gets outright banned - often eating temporary suspensions at the most. It's only when they escalate to the level of being an active hindrance to the cause that any attempt is made to rein them in via shadowbans and throttling. When you have this kind of fucking idiocy on this scale, people are going to see it and realize the obvious. Criminal record? Sex offender? No problem, assume a new identity and resume doing what you were already doing, declaring anyone who brings up your history is Deadnaming you, which is a ban-worthy trespass on most platforms.
So that explains why Troonism is such a widespread thing now, but what's with the pedophilia thing?
NAMBLA was always shot to pieces by the gay rights movement, so why the fuck is this so nascent in modern parlance?
The answer is complicated, and I could get into the details - for fucking pages - about how this is actually a part of extremist left ideology, but for now, all you need to do is focus on the LGBT movement as a political group. Over the last few years, as identity politics became more prevalent, Troons managed to finegle their way into being the top of the oppression pyramid, and have brought with it the ideological belief that ultimate freedom - namely the right to fuck absolutely everything - is their raison d'etre.
This is the reason they cry transphobia over anyone who won't fuck them, regardless of reason, and in turn, why there's so many insane sexual deviants now among their number. While they'll claim it to be otherwise, the LGBT community may as well be the T community now, as Lesbians and Bisexual people are seen as transphobes and gays are seen as insufficiently oppressed.