Naturalistic Fallacy
Naturalistic Fallacy says whatever is natural is intrinsically good or immutable, so we’d better leave it untrammeled and change nothing.
Although inequality is partly a choice, naturalistic fallacy makes people believe that it cannot be changed with policies. Although our brain is plastic, naturalistic fallacy stops us from learning and growing. Carnism is evil but naturalistic fallacy becomes an excuse to keep meat-based diet. Sexuality is not binary but people with naturalistic fallacy discriminate against sexual minority people.