You’re really bringing up the plant argument? Even if plants were morally considerable, which they aren’t because they can’t suffer, it would be more altruistic to eat plants because of the way trophic levels work.
It’s not clear that plants can’t suffer http://reducing-suffering.org/bacteria-plants-and-graded-sentience/#Plants
It’s not clear that plants can’t suffer http://reducing-suffering.org/bacteria-plants-and-graded-sentience/#Plants