> Yes, neurodivergence can only be diagnosed based on how you work on the inside.

I don't think this is exactly true. We don't involuntarily commit people to psych wards after a long and complicated investigation to understand their mental state. Diagnoses can be made extremely quickly and with little understanding of the interior state of a patient.

> Both autism are ADHD are vastly under-diagnosed especially in women and adults.

I've heard it said that both autism and ADHD are like height, in that it's not clear where the boundary sits. We all agree that some people are tall and some people are short. When someone claims that there are a vast number of undiagnosed tall people, though, to what extent is it because we're not reaching enough people vs because our diagnostic threshold for tallness has lowered?

> because our diagnostic threshold for tallness has lowered?

The threshold for being diagnosed as autistic has increased in recent years. As Asperger is not a separate diagnosis anymore but is part of ASD, some people that might have gotten an Asperger diagnosis would not get an ASD diagnosis today.

Again, a diagnosis requires that you have care needs. If you don't, you will not be diagnosed. There is no slippery slope of lowering standards.

There have always been neurodivergent people. Not long ago, here in Germany autistic children were systematically murdered during the Nazi regime.

The difference is that neurodivergent people don't have to hide anymore as much. We finally have at least a bit of a voice.