Earlier quoted context omitted.
I think the original argument is a good one, but lets try another. If we had fully lab grown meat that was identical to the real thing. How many of us would convert? In theory, we all would. In reality, we still covet mined diamonds, so we'll probably still irrationaly claim there's a difference long after there really is.
> If we had fully lab grown meat that was identical to the real thing. How many of us would convert? In theory, we all would. Why would we all, even in theory? If we could farm animals humanely, grazing them in areas where crops anyway can't be planted, letting them range, giving them a good life where they don't fear predators, don't freeze to death in winter or die of hyperthermia in the summer etc., and then kill…
Currently, most meat-producing animals are overfed and killed young. Would an animal that gets fed a healthy diet and killed once it's had a long and fulfilling life actually produce meat people would want?