If you think there's something wrong with being LGBT...?

What do you say to people who are born intersex?

There are many people, about 1 in 50, born intersex. For example, people can have one X chromosome and no Y chromosomes (Turner's syndrome), two or more X chromosomes and one or more Y chromosomes (Klinefelter's syndrome), etc. Besides which, the genes responsible for male development, particularly SRY, can be transposed from the Y chromosome to the X, or missing from the Y chromosome, producing XX males and XY females.

So you can't fall back on XX or XY, because not everyone fits in each category.

Then there are people with complete Androgen Insensitivity Syndrome; they are genetic males and develop testes, but their bodies respond to the low levels of estrogen that everyone produces, and ignore the testosterone. They develop normally, but don't menstruate. Most don't know.

Then there are conditions which can result in ambiguous genitalia. And, of course, there is transsexualism where certain parts of the brain develop along one set of pathways [female or male] while the rest of the body develops along the others [male or female].