Kleinfelter is not traditionally considered an intersex condition. The meaning of intersex has drifted with the works of queer gender studies professors like Anne Fausto-Sterling. Gender philosophers had been trying to expand the definition of intersex since the 70s either to queer/deconstruct gender/sex or legitimate trannies. This early 2000s response to Fausto-Sterling sheds a lot of light on the changes everyone has just kind of accepted.
www.leonardsax.com
Not traditionally, but nowadays it is considered an intersex condition.
But that's really the problem with the term, it's not a medical term with a hard definition, it's a political term.
You're right though, and I should've been a bit more judicious. There has definitely been a push to include more and more conditions in intersex, including things that don't remotely cause any sex confusion, like PCOS.
I wouldn't have included Kleinfelter in intersex, but I think considering their chromosomal abnormalities and some of the symptoms, they're probably stuck in intersex for the time being. There should be pushback against this kind of thing eventually but there's probably not anything that can be done about it for now.
Again, intersex is a political term without a hard definition.
What's important, I think, is that if the queer activists are gonna claim "lol 1.7% are intersex, as common as red hair!!" by including Kleinfelter et al, and then using that to get grant money from gullible politicians, anyone included in that 1.7% should be informed about it.
Anyone getting dragged under the "intersex" umbrella to be used to fundraise for Stonewall and other queer charities should know what's being done in their name.
Gynocemastia, hirstuism, micropenis, assymetrical breasts, and a lot of other weird shit during pubery are considered disorders of sexual development. Most if not all men with Kleinfter's don't suffer from the level of disordered sexual differentiation to be considered Intersex. It has more in common with fragile X syndrome making sufferers ugly, slow, dyslexic, inattentive, and even autistic.
In the US, I don't think any of those things are considered DSDs in and of themselves. They're considered possible symptoms of DSDs.
Like you can have gynecomastia because you're fat, or you could have it because of some congenital sex development disorder.
But yeah, I do think intersex is overapplied. But it's not a medical term in the first place, it's a political term. As long as they're trying to include Kleinfelters in that number, those men with Kleinfelters should be informed that queer activists are using their disorder to fundraise for transing kids.