In 100 years, I could imagine a society where young people are expected to find a gender identity in the same way as they find other aspects of themselves, and maybe their gender identity changes a few times over their lives. Imagining such a society doesn't bother me at all.
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Especially in people younger than ~20, I think that transgenderism today is often (but not always) a result of depression. It's a way to escape one's life, imagine oneself as a completely different person, and attract attention. But because it makes life 100x more difficult, it feeds the depression rather than helping it. This, I believe, is why the suicide rate among transgender people is so high: it's not primarily because they're harassed for being transgender, but because they were clinically depressed from the start. (This is just a guess which I have no evidence for.)
If the world had let's say 8 million people instead of 8 billion, that is if human life were really precious and rare enough for the continuation of the species, then transgenderism and all of the LGBTQ+ movement would be seen as a serious disorder that needs to be healed.
Instead, you have an overcrowded world, limited resources, and some powerful groups are very interested to push any agenda that will keep the population down. Lower T, lower natural instincts, lower procreative sex, lower will to power; in short more docile, passive, dysfunctional and defective people that will rather prefer to be farmed like obedient and dependent consumers instead of being interested in their self preservation and creating a progeny...
One lesson that can be deduced from the Covid pandemic is that the vast majority of the Homo Sapiens currently inhabiting Earth are conformist followers, very small % of the species are capable of critical and independent thought, so if the ruling elite would like to push any agenda, no matter how detrimental it is to quality of life and even survival, a staggering majority are easily and eagerly convinced to obey like zombies...