I haven't read the article in question, but I've been studying "enlightenment" teachings for a little less than two years now, specifically a framework of non-dual concepts describing happiness as laid out by Roger Castillo (link to his YouTube channel below). Let me offer my clumsy summary first.
All we're truly looking for is happiness in daily living.
The flow of Life will always be a mix of pleasure and pain. (Pain can be physical or emotional; sadness and anger are forms of emotional pain, for instance.)
Our unhappiness is always a result of our psychological attitude towards the flow of Life. We call this attitude "suffering".
Happiness is simply the absence of suffering.
Happiness is unbroken peace of mind regardless of circumstance.
Suffering manifests as 1. guilt, 2. blame, 3. pride, 4. worries & anxiety, 5. expectations & attachment to outcomes.
The root cause of all suffering is our false belief in "personal doership".
When we examine how thoughts and decisions come about, we find that they are always the result of a person's genetic make-up & conditioning through Life.
Our feeling of free will is both an illusion and a gift.
The experience of being alive as a human is designed to feel as if we are free to do whatever we choose in each moment.
Our own free will is never different from the will of Life.
When we deeply understand and feel that Life unfolds according to "destiny" (cause & effect), our attitude of doership & attachment falls away and peace of mind persists on a continuous basis.
None of these concepts are intended as "truths", merely as pointers for us to check against our own experience.
According to these concepts, "enlightenment" or liberation is something that, by this definition, we as (perceived) separate, independent "doers" cannot achieve. Life puts the false belief of personal doership in place through conditioning when we acquire language at 2 or 3 years old, and Life may or may not dissolve it by means of new conditioning (for instance, coming across these teachings).
In any case, if I apply these teachings to go, happiness (peace of mind) would not necessarily equate to a non-violent style of play. Rather, it might mean that we don't feel guilt for "mistakes" and accept that we cannot control the outcomes of our moves (such as our opponent's responses). It would also mean that we don't feel guilt regarding any of our painful emotions (temporary anger over a variation we missed, temporary sadness over a game we've lost).
Roger's YouTube channel for anyone curious to learn more about these teachings:
https://www.youtube.com/channel/UC3nxl1 ... Efw/videos