Now you're just making assumptions, mate. I've never self-diagnosed. Neither transgender nor neurodiverse are diagnoses, only gender dysphoria and a couple of buckets trying to categorize neurodiversity. I neither know nor care if I "have ADHD", i just know the meds calm me down despite me not having a diagnosis.

As per my previous comment, psychiatry does contain useful information that can be reclaimed. People identifying with diagnoses except for a personal twist (big O OCD, freezing ODD, euphoria transgender, etc.) is a natural step on the way towards a more true boundary-less understanding of psychology.

Imagine you've got a multidimensional non-Euclidean manifold and you want to be able to quickly specify any point on the manifold. It's non-Euclidean, so parameterization doesn't easily work. There might be a higher-dimensional Euclidean embedding/mapping but we don't know it yet. So what do you do in the mean time?

The easiest way we've found is to have a set of markers, so that every point in the manifold can be uniquely identified by interpolating or extrapolating from those markers. The DSM diagnoses aren't optimal, but they are useful as a set of markers that people are familiar with and can interact with the medical system through.