Not sure where the joke is in stating an incongruous pronoun to try and provoke a negative reaction is, to be honest. Either you won't get a negative reaction, in which case all you've proved is no one else in the room is as uncomfortable with trans people as you are. Or you will get a negative reaction, in which case you've just gained personal insight into why some trans people appreciate a supportive environment in which to share their pronouns. Either way, self-own.
The sentence is italics is where you are going wrong. I'm not sure if you are projecting your own issues, deliberately misrepresenting gender critical people or just misunderstanding so I'll be kind and assume the latter.
Discomfort with the current trans orthodoxy is not discomfort with trans people.
There are many ways trans people could have been supported.
It is Trans Orthodoxy that has taken it upon itself to claim the only way to support and accept trans people to to believe categorically that gender identify overrides sex, and that any distinction made for any reason between trans women and women, or trans men and men, is hateful and negating.
It is Trans Orthodoxy, not trans people, that requires public demonstration of adherence through rituals - and I choose that word deliberately - like the sharing of the pronouns and the removal of the words.
People who look for logic in these rituals (eg "How come a trans man can give birth, yet be negated by pronouns?") miss the point. It's not about logic or practicality or consistent meaning, it's about symbolism and public displays of obedience.
But the problem with Trans Orthodoxy as the "only" way to accept and support trans people is that is it simply wrong. It requires those of us who are not trans to lie about ourselves and who we are. That is how I know it is wrong. Not because of anything I feel about trans people and trans identities, but simply because my own identity, which I know as deeply and as as certainly as trans people know theirs, cannot exist in the reality Trans Orthodoxy requires.
Simply, if I believe in my own identity, which I do, and I believe trans people are honest and genuine about theirs, which I do, then Trans Orthodoxy is the thing that is wrong, because it can't accommodate both of us. We need to talk more, think more, dig deeper to find the truth that encompasses both.
But Trans Orthodoxy won't let that happen. It shuts down anyone asking "is there another way, a better way, a way that accommodates both the truth trans people know about themselves and the truth I know about myself?" by shouting "bigotry" just as other orthodoxies have used accusations of blasphemy and heresy to prevent discussion opening the cracks in the façade.
So my choice is not between "be kind" by submitting or "self own" by blaspheming. My choice is to lie about myself and submit to an orthodoxy that I cannot believe in, one that reduces and denies me, or to resist and continue to respectfully state my truth and ask that we push for a better way.
The only self-own is if I choose to submit to an orthodoxy in which I do not and cannot believe just for the sake of an easy life.