You're entitled to your opinion, but I won't conclude that what's fine for the livestock is fine for the humans. My mind can't seem to follow that and still have hope for humanity. We do have cultures prone to inbreeding traditions, and I'm pretty sure the science shows what happens as a result. Not something that appeals to me, though I'm a little less adamant about cousins. Didn't FDR marry his cousin? Maybe 2nd cousin, but she looked like livestock to me, so maybe your point is valid.
Yeah, mass numbers of cattle do seem to be a force when that which controls them has many years to plot and scheme and ingrain them with useful realities not current nor backed by stats. So that I'd agree with for sure.