In our finite world of tradeoffs, rights mean one thing must give way to another. For example, plants have lesser (no?) rights than humans, hence we eat plants

In our finite world of tradeoffs, rights mean one thing must give way to another. For example, plants have lesser (no?) rights than humans, hence we eat plants and not humans. Without a value ordering, which requires something other than monism, such common sense tradeoffs make no sense.