That's on you, then. People who use hormones and surgeries to alter their appearance so they look more or less like the opposite sex - or rather, so they look like the stereotyped way sexist people think all people of the opposite sex look - do not actually become the opposite sex. Only superficial sexists confuse appearing like sexist stereotypes of one sex with actually being that sex.

First, you were the one bringing up the visual part, with your "mental image"-comment. Second, as I already explained multiple times, "woman" and "man" denote social categories, not sex categories, therefore it is irrelevant what kind of gonads they might or might not have. And precisely because I don't reduce the terms "man" and "woman" to the gonads, I see the transgender man as a man and the transgender woman as a woman.

You and others who share your superficial view must find theater, films, drag acts, Halloween, costume parties and the dressing-up box at nursery school very confounding if you don't know the difference between looking a part and being that way for real.

there is a huge difference between medical transitioning and playing dress-up. A transgender woman doesn't take her breasts and femminized face of at the end of the day, and neither does a transgender man his flat chest and masculinized face.

Also, your definition is entirely dependent on sight - and on modern methods of electric lighting being present, operating and switched on during the hours of the day-night cycle that are dark as well. At night during a blackout, or out in the wild in the pitch black without a torch, you'd have to rely on other senses. Such as touch.

First, again, you were the one bringing up visuals. Second, most people will react rather negative if someone they don't know tries to use senses other than sight or sound to determine on how to interact with them.

The artificial chest orbs some males have implanted in their chests feel nothing like women's breasts.

First, not all transgender women need implants to have breasts (breast growth from HRT varies depending on the person and specific medication used), second, quite a lot of cisgender women get breast implants too.

And as blind people can tell you, the shape of a woman's and a man's head is different.

Foppington's law confirmed again.

Once bigotry or self-loathing permeate a given community, it is only a matter of time before deep metaphysical significance is assigned to the shape of human skulls.

That's because mother, father and parent aren't just nouns, they're also verbs - and have been verbs for a long, long time. Childrearing is an activity, something a person does - and there are many names for it, such as raising children, caring and bringing up a child. In the 1970s, people invented a new sex-neutral term to add to mothering and fathering: parenting. But the words woman, boy and girl are nouns only. There is no verb "to woman", "or "to girl" or "to boy." Girling, boying and womaning are not words or activities.

There is a verb form of man, but not in the sense you mean. The verb "to man" means

What does that have to do with anything?

When the new word "parenting" was invented in the 1970s, some people harrumphed over it, but most people didn't object - and coz it served a purpose, it was widely adopted. One of the reasons that parenting was widely accepted is that it not change or diminish the meaning of parent, nor did it change diminish the longstanding meaning of the words mothering and fathering, or of mother or father. (I know this full well coz I happened to write a newspaper article about it at the time.)

Including transgender men/transgender women into the words "men"/"women" does not diminish their meanings. Your attempt to define "man" and "woman" as being solely based on what gonads someone has does.

But instead, trans ideologues are hellbent on seizing already-extant words like woman, man, girl and boy and unmooring them from their longstanding meanings and basis in objective fact, then giving them all an entirely new meaning that reduces being a woman and a man to appearing like the sexist stereotypes that some people associate women and men and boys and girls with. Which many people both sexes find profoundly sexist, insulting, appropriative and arrogant. You're trying to tell the entire rest of the human race that all there is to being a man/boy or woman/girl is playacting, LARPing, cosplay - basically just looking the part, and the part as defined by superficial sexists to boot.

No, being a "man"/"woman" is not playacting, LARPing or cosplay. It is the lived experience of being perceived as, therefore being treated as and therefore living the life of a man/woman. That is a far more meaningfull way of expressing what it means to be a man/woman then whether reducing it to whether the person in question has testicles or ovaries.

And most people won't go along with that.

And in that, you are wrong. https://yougov.co.uk/topics/politics/articles-reports/2020/07/16/where-does-british-public-stand-transgender-rights , https://www.researchgate.net/publication/331998753_Public_Support_for_Transgender_Rights_A_Twenty-three_Country_Survey