There are some animal advocates who claim that we can’t promote veganism as a moral baseline because we can’t make moral judgments. (As if) Morality is just a matter of individual opinion.

If we cannot make moral judgments, then we can’t say that things like rape, genocide, and child molestation are morally objectionable. If we can say that those things are morally objectionable but that the morality of animal exploitation is just a matter of opinion or preference, and cannot be the subject of a moral judgment, then we’re just being speciesist.