That seems just like a strange interpenetration to me, like the point is that is should be theirs?

For the plants part, it’s worth mentioning that it takes more plants for animal products than it does to eat them directly

1 kg of meat requires 2.8 kg of human-edible feed for ruminants and 3.2 for monogastrics

https://www.sciencedirect.com/science/article/abs/pii/S2211912416300013