From ancient times, human species are flexiterian omnivores. Their menu depended on climate, geography and cultural era.
So, people can be vegan, vegetarian, and non-vegetarian under the ambit of our evolution. Even now, what we eat or how we eat is influenced by availability, interests, culture, and environmental conditions. Like people in temperate climate or colder regions are high-meat diet while people living in tropical or equatorial locations have high-plant diet.
Personally, I have a plant centric diet, with occasional inclusions of meat, predominantly eggs, and fish. It is primarily influenced by upbringing, as part of vegetarian household and a general aversion for animal-based diet.
I, like many in global communities, consider egg as vegetarian and as per traditions, consider milk product as best nutrition.
But I completely understand the allure of protein heavy and highly pleasing taste of meats of higher animals be it chicken, mutton, pork, or others.
The use of livestock as food resources can't be ignored when we see how much entrenched they are in people lifestyles. Still, I also understand the viewpoint of animal lovers to reduce sufferings of these sentient creatures. That is the very reason I have limited my intake, in special days or celebrations. Does it make me a hypocrite?
Looking back, I always had soft spot for animals. I stopping fishing in childhood, because I couldn't see them struggling once captured and taken out. Avoided the visits to meat stall or butchery. Even recently when visited chilika lake, I avoided crab curry because he asked me to choose the crab to kill and make it fresh.
They say, people will stop eating non-vegetarian in commercial setups when they see how animals are treated in slaughterhouse. Sometimes I wonder how people can regularly visit or work in such places without impacting their mental health. Have they become numb, or lost their abilities for empathy or compassion. Then again, they have to feed their families, and someone had to do these works. Hunting is separate thing, when done for pleasure, thrill and display of power.
So, I don't think we could reach any consesus on choosing our diets.