I think another cause is our media environment.

Assuming ADHD is to some extent a chemical thing (I.e. brain didn’t properly develop impulse control or attention span or whatever), we now live in a world that enables those exact things.

If you lived in a world where the principal media were written articles/books and long-form TV shows/movies, your brain was still trained to focus.

Most media is now basically an ADHD simulator, with constant context switching, intense stimuli etc. which only reinforces whatever ADHD traits one may have.

I would guess it’s somewhat similar to the interaction between smoking and asthma.

ADHD results in a dopamine imbalance which results in the sort of novelty seeking behaviors they tend to exhibit.

Part of pubescence is incrementally transferring your reliance on your parents to reliance on your peers. Which is why teenagers test boundaries constantly. They have to divorce from their parents incrementally, and on their own timeline, not the parents’. Your brain has reward systems to encourage that, but can also be hijacked by substances, which is why we pay special attention to substance abuse in children. But there are many reasons for children to fail to socialize, some of them environmental, and a biological drive to fill that with something (including The Internet and “engagement” in particular) if it can’t be filled with social safety. And once it has begun it can be a feedback loop of intentionally choosing one over the other.

There are some models of addiction medicine that say that people with hope and connection have a much easier time giving up physical addictions than people who don’t. There isn’t enough stick in the consequences of addiction to get you out of the cycle. You need carrot to transition, and the bigger the carrots the easier the journey.

Yes, our modern world is perfected to provide as much distractions to ADHD brain as possible, while working life has become more mentally demanding. Lots of people who struggle now would have done okay 50, 100 years ago when there were less distractions, and larger share of population did physical jobs instead of knowledge work.

Meh, I think this is the impression people who don't have it tend to get, or maybe it's like that for some people deep into the hyperactive dimension. While I do find some of it problematically engaging for a little while, I think it's the people around me who don't have ADHD that get more fixated on that stuff. It wouldn't be as chronic as it is if it wasn't much more broadly appealing than there exists a population of people with ADHD.

For me, I need something more deeply stimulating and long-form. A good weekend outing for me is a 14 hour hike with a sketchy scramble. I don't get any value out of constant context switching, constant bright flashing lights like rythym games or any of that, and I'm way more comfortable than most literally just sitting quietly and thinking.

I think the big divergence between how I respond to my environment and how normal people respond to their environment is that normal people tend to be problematically attracted to artificial gamified stimulated experiences, like academics, slot machine style social media, scary movies, sports, stuff like that. My biggest difficulty is that I just don't really care about arbitrary competition, benign social threats, existential danger etc.. I'd much rather be in a position where I'm actually in real danger if I mess up, or if I write some program incorrectly and risk leaking sensitive data. That's where my brain works at its best.

Right now I'm hesitating to go back to school because I have no idea if I—as a man in his mid-thirties—will be able to trick my brain into being stressed appropriately when exams come around, at least enough to show up and complete them.