It’s as much s habit as it is a habit for lions to hunt prey; or pigs. I understand we could choose to go vegetarian, but it’s more than overcoming “habit”. We’re omnivores, by nature, not by habit. My point is that being facile is detrimental to a cause. Yes, with effort we could become all vegetarians, but it’s more than overcoming habit (a habit is leaving the toilet seat up).
