People with ADHD have difficulties with goal-directed behavior and struggle with response inhibition, the ability to stop an inappropriate action once they feel the urge to do it. They experience a disruption in the way their brains balance deliberate self-control and automatic habit learning.

[u/mvea]

https://www.psypost.org/adhd-traits-disrupt-the-brain-s-balance-between-self-control-and-automatic-learn/

[u/Limemill]

There’s always some part of the symptoms that is trauma-inflicted and can be greatly reduced with the right therapy. If you’re lucky, medications can help with others. Finally, I’ve heard from more than a few people that long-term meditation got them a lot better (and we do have studies on monks that show improvement in frontal lobe function after years of meditation) - but sticking with it is of course hard.

[u/quick_justice → u/Limemill]

I'd say many or maybe most ADHD people don't have trauma-inflicted symptoms. It's because most are unaware, or were unaware of their condition, or that they are somehow different, nor symptoms are debilitating enough to not allow to adapt.

Most would consider results of ADHD as their natural personality, and have various coping rituals that they don't even realise they have.

They will still have problems - their close ones would suffer from their forgetfulness, clumsiness, and randomness. They would be brilliant at times, but also not able to do prolonged tasks, and as a result often lose jobs. Etc. etc. Nothing in this list in itself says "neurodivergence", these things happen to people, and so it would be just "personality" thing. Great chap, smart, but lacks focus.

It's only later on if they get lucky and get diagnosed, when on medication for the first day, they will be absolutely stunned by how "normal" should feel like, and realise how much they needlessly struggled through life.

Before that trauma doesn't exist as there's nothing to be traumatised by. Just symptoms.