Cash crops such as soy that are a mainstay in vegan diets? What do you think most of the cows eat before they're slaughtered for your lunch? A five year Oxford University study done on 38,700 farms showed that if everyone in the world switched to a plant based diet, we would be able to reduce agricultural land by 76% [1].

[1] https://pubmed.ncbi.nlm.nih.gov/29853680/

If only we ate grass fed beef exclusively. Unfortunately this is not the case.

Seems a heck of a lot easier to motivate people to feed their cows on land nobody wants anyways than to invent "vegetarian meat".

Unfortunately not. There is simply not enough land to replace all beef with grass-fed beef.

Citation needed, because there is a lot of unused land in the world.