FYI: SlimeMoldTimeMold has been heavily debunked across multiple topics. It was popular for a while in rationalist communities for the multi-part series claiming lithium in the water supply caused obesity, until everyone realized the author has a serious habit of misrepresenting sources, claiming citations say things they don’t, and omitting contradictory evidence.

Thanks.

Any idea whether or not their characterization of psychological diagnoses is mostly correct?

I am not an expert on neurology or anything but for ADHD at least there is definitely a biological difference, it's not just a diagnosis of a bundle of psychological symptoms

It is treated with stimulants, but if you give those same stimulants to a non-ADHD person you will see very different results

What a terrible analogy. Diagnosing a car with “broken-downness” would be like a mental health professional diagnosing you with “bad.” Diagnosed aren’t always great, but they’re not that ridiculous.

Still down a bit and you’ll find plenty of vagueness with mechanics. “You have a bad tie-rod end.” Ok, cool. What caused that, why did mine fail when my buddy’s didn’t, how can I avoid this? Shrug. Once you’ve got it down to a part, you just replace it with a new one. Can’t do that with mental health. “Your time management unit is bad, we can replace it with a manufacturer part for $2,000, or an aftermarket equivalent for $1,500.”

Things can be that ridiculous and still be our best effort.