I think the word you were looking for there was cisnormativity? That entire ideology that to be cisgender is Normal and Good and Desirable, and that those who are not should aspire to be as close to it as possible, and to do otherwise is to be morally suspect. It's something I was intentionally poking fun at with the comment early in the thread about trans meetups being a chance to hang out with normal people, instead of cis people.
You see similar patterns in other contexts as well; with misogyny for example, men are viewed as superior, and thus, women aiming to enact masculinity are viewed as misguided, misled, or confused, but ultimately understandable as they are aspiring to become superior. Whereas men aiming to enact femininity are viewed as deviant, and morally repugnant, as they are aspiring to debase themselves into the inferior group.
The intersection of this with transphobia becomes transmisogyny, where transphobia interprets people into these categories, and misogyny does the rest. This is also why, in most media today, you see trans women depicted as predatory, morally suspect, and criminal. And why you see trans men depicted as confused, misled, and infantilized such that they aren't allowed agency over their own decisions. They also don't really care whether these categories are particularly accurate, and will slot in nonbinary people, or just anyone, into whichever side of this binary system they find most convenient to interpret them as through the lens of transphobia.
Heteronormativity is similar: This underlying belief in society that to be heterosexual is Normal and Good and Desirable, and that The Gays should attempt to emulate it as closely as possible, and assimilate into straight cultural norms in order to be accepted within society.
To really Get It, those normative beliefs need to be jettisoned. Not only are cisheteronormative systems not what should be considered 'normal' or something to aspire to and look up to constantly, but that going beyond them and annihilating them is what should really be aspired to, as they are actively evil and actively making the world a worse place, both for those considered normal and those considered abnormal. They are a giant set of invisible chains binding every person in society to useless expectations.
Break those chains and understand it's not "this trans person may some day live a normal life if given enough assistance to become normal" but rather "this trans person has been doing intense self-examination for the past 4 years and has crafted their very being into an intentional work of beauty to which everyone around them should aspire, and whose existence outshines dozens of others put together." There's like, this slogan y'all have probably heard, "Love is Love," which constantly gets mocked in many of the queer spaces I'm in, specifically because of the implication that normative straight love is the gold standard by which all others are measured. But why should it be? Aspire to be better tbh; look at the failings of cisheteronormativity, learn from them, and build something better in its place.