ADHD makes you more intelligent in the same way that being chased by a bear makes you a runner, or having kids makes you a morning person.

A weaponised intellect is a useful counter to ADHD. We also tend to be built differently. Think tank Vs car. This makes us abnormally good at certain tasks, at the cost of others.

Poor impulse control, novelty seeking, and unlimited internet access tends to explain the rest.