@PandyMoanyMum, all that tells you is there are TWO sexes in humans (and most other life forms) and that developmental DISORDERS exist. There's no third sex, no in-between sexes, no people with both sets of reproductive organs.
Things can go wrong during foetal development. They go wrong in any body part for an assortment of reasons. Babies are sometimes born with extra limbs, less than four limbs, with incomplete faces and all sorts. We don't say this proves the number of limbs a human has is complicated, do we? Or have you ever heard anyone insist the mouth and nose are not separate features and it's bigoted to assume they are?
It's very strange that people get so worked up about disorders of sexual development. The fact that they do shows, if anything, that sexual dimorphism's so strongly featured in humans that many can't get their heads around it. They find articles like the one you cited and go "Aaah! It's all so weird! None of us can know what sex we are!!"
People who actually have disorders/differences of sexual development know exactly what sex they are. Fyi, no female in the world produces sperm. That requires a Y chromosome. Some - a very, very few - males (people with a Y chromosome) develop female-pattern bodies. They do not produce sperm or ova. Since they've been raised a girls and, with hormonal help, develop as women, I tend to the view that people with Swyer syndrome are women. Some don't, because they are chromosomally male.
However, people with DSDs are extremely clear they reject the view of their disorders as proof of 'trans' and have repeatedly asked genderists NOT to use them as an argument. I don't blame them.
Thinking or feeling you ought to have been the other sex is not a DSD, it's the outcome of gender stereotyping. Any fucker can wear what they want and fancy whom they like, at least in cultures like ours. In some places, of course, people who are same-sex attracted or prefer to dress as the opposite sex are killed or forced to have genital surgery. Personally, I fail to see this as a model to emulate.