This is generally why I think that there are some truly trans people out there, because the genetics can get a bit blurry, hell, everything in biology is a bit blurry.
That's the funny thing, individuals with DSDs don't have higher rates of transgenderism. (Some troons like to claim otherwise, but you'll find most of the studies supporting that conclusion involve anonymous surveys distributed on places like tumblr, asking people if they "identify as intersex")
Those conditions are probably the only thing I'd actually consider a legitimate reason for transgenderism and it doesn't seem to be a big motivator.
Somewhat off-topic, but I've been watching some of the "Waffling Willow" detransitioner videos that were posted here. She said she cried much less while taking testosterone - only "once a month" or so.
If once a month is notably infrequent, exactly how fucking often are hormonally-normal women crying?
I've heard that from a few detransitioners before. I can imagine testosterone blunts emotions to some extent. (And aggravates other emotions, like anger.) It's interesting.
We know hormones can affect mood. Roid rage is a thing.
personally, I buy the spectrum argument. Because biology is messy and so are spectrums.
Sex isn't a spectrum though.
Sex is defined in mammals as the two sex classes that partake in reproduction. That's the starting point for the whole concept and everything rolls downhill from there.
In fact, DSDs are sex specific. Some only affect males and some only affect females. An individual with a DSD is still male or female, just perhaps with some sex related things malfunctioning to varying degrees.
That being said, it is still true, that genetically they are male, failed genetically, but genetically still male. Just because your Y doesn't work as designed it doesn't mean you don't have it. If intersex people are few permile (as most intersex embryos are not vible and miscarried early) and CAIS is estimated at 2-5 per 100 000 (0,002-5%), statistically speaking it's nonsignifacant in saying that female are XX and male are XY, binary is and it always was the same and non changing, even if it fails to properly express genetic coding. So I would call CAIS person a woman in social context, but I would still consider them male.
The thing is, sex isn't tied strictly to the Y chromosome itself, but more specifically the SRY gene that is almost always found on the Y chromosome. An XY individual with a mangled SRY gene is female. Or if the SRY gene gets transposed (another genetic anomaly) to the X chromosome, you can end up with an XX male.
(Well mostly, there's evidence that some less common genes can fill in for the SRY gene, but by that point, we're really getting into the weeds.)
But yeah, ultimately, none of this shit has barely anything to do with transgenderism. Troons are just using people's unfortunate medical issues to argue for their weird fetishes or mental issues.