I'm unsure what this comment is trying to say. If your objective is to have empathy for plants and thereby eat fewer of them, then you would also seek to eat less meat since raising livestock requires vast amounts of plant-based feed. In addition, any scientist who has ever taken an animal laboratory ethics course will understand that there exists a rough hierarchy of public empathy towards certain animals: first primates, then typical companion animals, then livestock animals, then fish, then vermin, then insects. There is no "gotcha" here; it is entirely reasonable for someone to have more empathy for, say, mammals than they have for grain. And I say all this as someone who eats meat.