Green - An environmentalist community

My responses to that are:

1. What counts as arable? Can you grow literally nothing on it, or is it just unusable for mass industrial mono-cropping at a scale that competes?

2. IIRC even if ruminant grazing is the most efficient way to produce food on this land, it's still be a severe environmental net negative as opposed to other non-food uses, namely rewilding. Of course this is true for cash crops as well, and I don't know how the payoff compares, but a lot of animal agriculture defenders like to use this argument to imply that grazers can just be slotted in on the margins with no downside.

3. Based on the map in the article, a substantial portion of land still goes to farmed livestock feed. Eliminate all of that first and then we can actually see how much of this beef is purely ranched.

Meat eaters do love to champion the most ethical and environmental corners of their supply chain, and I appreciate that, but everyone I know that buys a half cow for their deep freezer from a sustainable local farmer refuses to draw the hard line in the fast food drive-thru. "Conscious" meat exists to justify all meat consumption rather than replace it in the supply chain, from my experience growing up on a small hobby farm trying to produce it.