dunno if people want to hear my troon ass views but i'll say this much;
people love to deny this all the time like it's blasphemy but gender dysphoria is a mental illness in of itself, but not in the ways of schizophrenia, or how most social stigma deems mental illness.
it is tricky to say that you feel like a man/woman, or to claim that you are, but what happens is with gender dysphoria is the disconnect with your body, and in most cases, you form suicidal urges or tendencies the more you continue to live life as the gender you want absolutely nothing to do with. the language may not be appropriate, but it's the best some people can come up with.
:powerlevel:; i know that i'll always just be a mutated body & never actually be the biological gender that i wish i was; so i can understand saying "i am a man" or "i am a woman" as somewhat of a positive affirmation to one's self, as the reality of what you actually are makes you want to kill yourself each day.
unless you're a trender, who has no real concept of this.
in which case i could undeniably see someone taking that too far, into actually believing they're a biological man or woman, which is in fact delusional. it's just that with SJWs, they have no boundaries or lines that they make not to cross unless it's convenient, and thus further makes us look like a big fucking joke.
there is the possibility of an mental illness offsetting gender dysphoria, but ultimately it is a case by case issue that can't truly be determined on a general basis.
different mental illnesses can bounce off each other & affect how a person functions in their daily life, but essentially what would be considered a cutoff is a blurred line unless you're a professional who has the capability to differentiate such things, in my perspective, which is kind of skewed anyways.