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.