I mean maybe you are, but I'm making a critique of the article. The articles second point is immaterial to their premise.

we’re in agreement that plant-based diets are a bigger improvement which, to me, is the more important point.

It seems to you are more concerned with the moral signaling the article is doing, and evaluating the quality of the arguments based on how well they agree with your moral codex. I'm making the point that a plant based diet is immaterial to beef being good, bad, or indifferent.

I think we have different understandings of what the premise is/should be.

I'm taking the authors word for it with regards to their premise. Its the headline is the premsie of the article: "regenerative grazing can’t make beef climate-friendly", and they make 8 arguments to support that premise. That's the premise I'm evaluating the article against.

I think it’s unlikely that either of our minds will change on what that premise is in any case

You not having reading comprehension, or not understanding the article or forms of argument is a separate thing. You're quite literally projecting what you want the premise of the article to be. You had an opportunity to have an informed discussion with someone who literally is a primary source for the contents of these kinds of articles, and you've done, whatever this is, with that opportunity.

You should take the time to learn to distinguish between tribalism and moral signposting, and actual argument. And if you aren't going to make that distinction, expect regular pushback when you confuse these things.