Inefficiency. Entropy. Laws of thermodynamics.

Think of it this way. In a game of telephone, signal quality degrades. Remove the middle-men, you improve the signal-to-noise. In a similar manner, there is little point in raising livestock on land, only to greatly pollute said land, only to produce a substance in less quantity and quality than what you could've done in its absence. Less demand means less livestock raised or tortured.

In another way, if you are saying that whether these animals roam free and die by the nature versus being grown in confined cages to be harvested... Then I wager whether if aliens descended upon this planet and you could either live as you do or you and your offspring be raised like cattle in a dark cramped alien farm, hauled around by convey-belts for the slaughter — tell me, which would you prefer?

Edit: This peculiar user who lacks the capacity to respond with a single coherent comment in the thread (Schizophrenia? I don't know...) espouses various logical fallacies and deflections. I am utterly unimpressed by their incoherent rebuttals and have no interest in discussing with bad-faith laziness. My points remain largely untouched.