I believe in accepting trans people as their their internal gender not due to rape but because the world is a better place when they are able to transition and are accepted as their internal gender instead of biological sex determining gender. The separation of sex and gender explains why some people are trans, and I don’t think things these people deserve to be pushed out of living because they’re a little bit different.
It may seem like it’s less out of touch with reality for people who grew up in cultures with binary gender models. However, many other cultures have more than two genders. Variance from the binary gender model has happened naturally in many societies for millennia. For example, the Fa’afafine of Samoa, the Hirjas of Bangladesh, the Native American Navajo had 5 genders, Muxes of Oaxaca Mexico, and countless other societies have all had more than two genders based on factors other than biological sex.
It’s only the Europeans centric colonial view that there are only two genders and they are based on sex, and that doesn’t mean it’s accurate. These other societies functioned just fine having more than two genders that are the same as sex. Gender is a cultural concept, so allowing gender variance in society, that doesn’t always align with sex isn’t denying reality, it’s just changing a cultural concept based on what works for that society. Allowing trans people to live peacefully as their internal gender saves a lot of lives, then I say it’s worth it to grow as a society and accept this change.

Here’s is a parable. Let’s say there is a group of people who live in a place where the only safe food to eat is corn, apples and beef. Everything else is poison. One day due to climate change all the apples die and no longer grow. As a result everyone starts getting scurvy and people start dying. Soon however some discovers that straw berries are growing and someone suggests everyone start eating them so they can get vitamin C and not die of scurvy. But some people in the tribe argue that anything other than corn, apples, and meat are not food and thus should not be eaten. Eating any strawberries would be denying reality. It’s wrong to eat strawberries because they’re not food. These people have a culture where they only believe food is those three things and they resist eating abythh uh one else, even when people in their community start dying of scurvy. They refuse to live a delusion that strawberries are food.

Gender is a social construct, and gender variance including trans people can be accepted into society and it prevents the death of many good people. If it saves lives I think it’s good.
Sex is biological, and should not be ignored but acknowledged and respected as something different than gender. Both can exist.