Well here you're talking specifically about trans issues rather than more general questions of sexuality. I think it's important not to pack these all under the same umbrella. They're very different.
And yes, of course I agree. Mental health issues, whatever their cause (mental health issues are on the rise in all categories) should be taken seriously and addressed.
There are important conversations to be had about trans healthcare. Especially in young people. As you say, detransitioning is on the rise (though it's still, as far as I know, a small minority of cases), and this is largely due to an "affirmation at all costs" attitude amongst healthcare providers. There have been numerous cases of doctors overlooking or ignoring other mental health conditions in trans teens. This, I think we agree, is a bad thing.
But also, if you really want to have that conversation, you also need to have a conversation about breast implants and Brazilian butt lifts and tattoos and pretty much all cosmetic surgery. Modifying your body to fit your internal desires is not new.
So while I agree with your basic point that nobody should be forced to accept a view of reality that they don't agree with, in a society where discrimintation exists, some degree of "forcing" is sadly sometimes necessary to ensure people's safety.
I don't say that lightly. I'm absolutely aware of the dangers of totalitarianism. But, for example, in the sixties, restaurants and schools in America were "forced" to accept black people. You may have heard of the Little Rock Nine, where the national guard was brought in to enforce the ruling of Board vs Brown which meant black children could attend previously all-white schools. These nine black kids literally needed a military escort to protect them from the protesters.
No doubt, many of those people would have made the same argument you're making about "forcing" white people to interact with black people. But race relations wouldn't have made the progress they have if not for that "forcing". At least not as quickly. So yes, I'd argue that it's right to force society not do discriminate or oppress another group. It would be lovely if this happened organically, but sadly that's not always the reality.