ADHD, OCD, ADD etc are not things you can have - these are disorders, a collection of symptoms, diagnosed by consensus (no real objective testing that can validate that a patient has this disorder, its a questionnaire).
I can say that having a purple hair and sleeping less then 6 hours a night is a Purple Hair Sleeping Disorder (PHSD).
Bottom line is, we have no real idea what are the actual physical and mental causes - what is the REAL illness, the pathological anomalies - that ADHD is the symptom of, and accepting ADHD as a THING means we are not digging deeper to find the real cause.
And as a side note - the DSM (which defines ADHD), once defined being gay as a disorder (and hence treatable).
How does "Accepting ADHD as a thing" mean we're not digging deeper? Would it help if the collection of symptoms were totally disregarded? Since Cancer was discovered, has investment declined? How can you begin to ask if there's nothing to ask questions about?
Side note: Most governments and most people didn't look too highly upon homosexuality, and we don't know everything about it, but things have changed and we haven't invalidated everything that said something different than we currently believe.
Accepting ADHD as a thing, immediately means accepting all the so-called treatments for it (Concerta, Ritalin etc), which immediately creates a (huge) market, with market forces that will do everything possible to maintain the market alive and kicking - hence standing in the way of digging deeper.
Cancer is diagnosed in a very methodological and strict way, and the fact that we discovered it doesn't mean we discovered the cure for it (sadly, curing cancer is very hard).
I have no problem with ADHD being a defined disorder that we can ask questions about - as long as we understand that
it is not a thing, cannot be objectively diagnosed (and therefore treatments are as vague as the diagnosis), and people cannot have it (the same way we have a flu or COVID-19).
About homosexuality - it was just an example of how the psychiatric bible - i.e., the DSM - can get things horribly wrong and therefore should be taken with a grain of salt.
I can say that having a purple hair and sleeping less then 6 hours a night is a Purple Hair Sleeping Disorder (PHSD).
Bottom line is, we have no real idea what are the actual physical and mental causes - what is the REAL illness, the pathological anomalies - that ADHD is the symptom of, and accepting ADHD as a THING means we are not digging deeper to find the real cause.
And as a side note - the DSM (which defines ADHD), once defined being gay as a disorder (and hence treatable).