Are you the kind of person who ignores the moral arguments against eating meat by saying "others aren't going to do it"? I don't understand the criticism. This

Are you the kind of person who ignores the moral arguments against eating meat by saying "others aren't going to do it"? I don't understand the criticism. This is an argument in practical ethics; it doesn't matter how unpalatable the conclusion. It took 300 years for people to catch up the utilitarianism arguments Bentham was making in favor of gay rights (for example).