I'm not an ethical vegan or a vegan at all, but I'm aware of our mass agricultural system being terrible ethically for animals.

If just chickens and cows ceased to exist, I don't think the world would suffer too much. Goose and ducks would fill the role chickens have in aerating the soil.

> To be devoid of purpose due to lack of existence?

Plenty of people and creatures commit suicide when life is too much to bear. Sometimes depriving oneself of life can be a blessing. If I was hooked up to a machine that just drained me of blood, milk, or something else and I was force fed, I'd probably kill myself if able. Why do we not afford a creature the same pity?

And again, I say this as someone who eats meat.