Right. What you do - stroke or no stroke - becomes paths in the brain. Habits are simply more well established paths. What you do today influeces what you'll do tomorrow. And so on.
That is, what you "feed" your brain will manifest itself physically as paths in the brain. Full stop.
When you develop a habit of consuming violece - and enjoying it - those paths are real. Pretending they don't exist doesn't make them magically disappear. Confirmation bias works that way, the science does not.
Furthermore, human behavior is often learned for the collective. That is, for example, given a group of cigarette smokers, the more who quit smoking, the more likely others in the group are likely to quit.
Put another way, going in the other direction, humans naturally gravitate to broader norms. That is, the more I see others with excessive weight, the more likely others will join that club. So yes actually, you are what you eat. Literally.
Now please explain - not being snatky - how that's nonsensical.
