We all know what ethics is. It is a derivative of your traditions, like Western Civilization, or your religion. These bedrock beliefs and traditions tell you how you should behave, and that results in a code of ethics. The problem is, to modernists, both Christianity and Western Civilization are outdated prejudices. So here you are, you have rejected all your traditions and your religion, and you want to block scientific advances.
Leftists do what they always do.
They simply declare that they are now experts on ethics, and all the respectable conservatives agree with them. We have an established religion in the United States. He teaches a course in Ethics. They pronounce on morality. They tell us what we should do, something which our parents and our clergy once did.