Beautiful heroine in secret Id is on the beach eating a snack. A guy walks up to her (actually Foxbat in his civvies) and says: "Hey there, wanna go out with me? I'm gonna... take over the world someday."
(much laughter at the table, while the heroine looks at this guy with unbelieving look.) She can finally only say, "Noooooo."
If you feel that people are trying to bully you into identifying yourself as a cis male, you are overly sensitive (I know that commenting on the validity of other peoples feeling is not PC, but I thought you would appreciate that).
The terms cis male and cis female are used primarily in LGBT discussions, and by people trying to give an LGBT perspective on a particular issue. Now it is fine to say "hand me the wrench" when you are dealing with a small toolbox which has only one kind of wrench. When your tool box contains a socket wrench, a crescent wrench, a pipe fitter wrench, a monkey wrench and assorted combination wrenches it pays to be specific when asking for a wrench. The LGBT world has a lot of types of wrenches. Having a quick way of indicating that you are talking about someone whose biological sex, gender identity, and sexuality all match up with societal expectation can be very helpful at times.
Now, you want your personal gender/sexuality combo to the default, requiring no prefix even in LGBT discussions, while all other gender variants receive some sort of label (homo, bi, trans, cross dressing, etc.). Well I can see why you would want that, but I can't see why the LGBT should concede that to you. Certainly not if your best argument is to point to chromosomes. You've already conceded that alternate gender/sexuality have been shown different neurologically structures compared to the "norm". This has been established by multiple studies. It is a fact as you say. That it might be quicker to do a chromosome test or look at what is between someones legs than do a head CT, is irrelevant. As I pointed out the cis prefix outside of organic chemistry is used mostly in discussion of gender identity and sexuality. Neurological structures often trump gross anatomy in these matters and it is perfectly legitimate that the language of these discussions reflect this.
Boldly stated, but mostly BS, and totally BS in the current context.
Language is the battlefield upon which wars of idea if fought. However, it is also common ground upon which peace treaties for those wars are forged. If one side totally wins the linguistic war, then your soldiers are terrorist, your religion is heresy and your natural sexual practices are perversions. At that point, your conscience, expressions and thoughts are truly straight jacketed. However, what passes for political correctness is not at that point. It is mostly just an effort to be polite to others who are different than you and yours. Having the linguistic tools to respectfully speak to one another is an aid to open dialogue, not an impediment. The restrictions that are placed by mainstream PC speech* are rarely a serious impediment to free expressions of ideas unless the idea that is being expressed is that their group of people is inferior to your group of people.
Certainly the term cis gendered poses little danger of straight jacketeding expression. It is merely a particular gender/sexuality that happens to be yours and you want it to be the default even in discussions where a range of gender identities are being discussed. Well tough. You don't get to have it that way.
*Note the description of wives as "unpaid sex workers" never caught on and has never been the official PC term for them
So, do we go with Groucho as Batman, with Chico as the joker and Harpo (in drag) as Harley Quinn, or Groucho as the Joker, Chico as Batman, and Harpo as Robin? (Either way, Zeppo is Commissioner Gordon, and Margret Dumont is Catwoman.)