Our current scientific understanding in no way leads to such a conclusion.
However, even considering the hypothetical that plants are sentient, eating plants actually causes the least harm seeing as livestock are not very efficient converters of plants to meat.
>eating plants actually causes the least harm seeing as livestock are not very efficient converters of plants to meat.
Let's continue this facile logic to it's conclusion: if animals are causing so much "harm", why shouldn't we kill them to prevent them from "harming" so much?
However, even considering the hypothetical that plants are sentient, eating plants actually causes the least harm seeing as livestock are not very efficient converters of plants to meat.