I have gender dysphoria myself, and you get an upvote from me because I think you are speaking the truth in a way that would lead to better outcomes for many of the affected people, if one properly thought through the implications.
I understand gender dysphoria (as opposed to body dysphoria/dysmorphia in a stricter sense) to be a mismatch between someone's own preferences, interests etc. inasfar as they touch on categories that society has declared to be gendered, and society's expectations of the same - at least those of your local bubble of society.
This means there are two non-mutually-exclusive ways to make the lives of gender dysphoric people better: (1) let them change themselves (many options from pronouns to hormones and surgery), or (2) change society's expectations. Out of sympathy for people suffering from gender dysphoria, I wish for a bit more of (2) in the world.
Even in a vastly improved society, there will be people who decide that medical changes such as hormones/surgery are right for them, and as far as possible we should support them. These people existed, in small numbers, before "trans" was cool, and they will still exist when the media interest has picked up some new favourite category. (By analogy, Tourette's syndrome is also a real thing that existed before the internet, and will still exist when this particular media spike has died down.)
The "trans/gay/lesbian is cool now" explanation doesn't hold a lot of water to me. If I had the choice to not be gay, I wouldn't be. Life would be so much easier, emotionally and otherwise. Sex would be lower risk and it would be much easier to find a romantic partner. I spent a long time - two decades - suppressing it, as hard as I could, and it did not go away. Instead I was anxious and depressed. After I started to accept myself, those things became a lot better. I look forward to the day I come out.
Transitioning is 100x harder. The nonconformity is obvious. The antagonism directed at transitioning people is unavoidable, strong and potentially deadly - violent and lethal attacks on trans people are becoming much more common every year. Compulsory sterilization for people legally transitioning is still mandated in many countries and was only abolished in progressive countries in the last few years.
No, nobody is doing any of this because it's "cool".
It is "cool" inside a very small, but very powerful, stratum of society. You are right that there are still a lot of places where being queer (whether of the LGB or T variety) is a huge disadvantage.
Even within that stratum, I'd argue that it's more "acceptable" than specifically "cool". Or if it is "cool", it's in a superficial sort of way that doesn't relay any real benefits or privilege.
I guess one could argue whether getting upvotes, likes, views and such on social media counts as "real benefits", but that seems to be exactly what's going on with some of the Tourettes-on-TikTok people. You get lots of validation coming your way, you get to be part of a community, and you get +1 armor against trolls who claim it's ok to punch as long as you're only punching up.
I understand gender dysphoria (as opposed to body dysphoria/dysmorphia in a stricter sense) to be a mismatch between someone's own preferences, interests etc. inasfar as they touch on categories that society has declared to be gendered, and society's expectations of the same - at least those of your local bubble of society.
This means there are two non-mutually-exclusive ways to make the lives of gender dysphoric people better: (1) let them change themselves (many options from pronouns to hormones and surgery), or (2) change society's expectations. Out of sympathy for people suffering from gender dysphoria, I wish for a bit more of (2) in the world.
Even in a vastly improved society, there will be people who decide that medical changes such as hormones/surgery are right for them, and as far as possible we should support them. These people existed, in small numbers, before "trans" was cool, and they will still exist when the media interest has picked up some new favourite category. (By analogy, Tourette's syndrome is also a real thing that existed before the internet, and will still exist when this particular media spike has died down.)