the ego side of it is where I feel 'addiction' is just an easy out.
'Sorry, I was just addicted to the dopamine hit of cheating my friends" doesn't sit right with me.
Are the addictive traits of someone who cheats a factor? sure. possibly, and may even be a strong factor in this case.
I think most of us know or have known people in our lives with addictive traits, but to do that to people you call friends adds another level of narcissism that goes beyond 'I had no control over it'
A heroin addict who steals $40 from their grandmothers purse because of addiction is sad, and hurts the people they love. But I understand that drive that is beyond their control.
A cheater who steals from their friends in a card game, just doesnt feel like someone who is 'chasing that hit', it feels much more like someone who enjoys act of not getting caught. its about control, its about ego. Dopamine involved? absolutely, but motivations are very different.
Just my own opinion.
FWIW; based on my time playing with this person, and based on results, im pretty sure they were not cheating when we played.
Also, let's continue this discussion at the poker table. See you in Dallas?