Levin's (and many other bioethicists) credo: that the moral complexity of scientific issues means that scientists should not make decisions about them.

Wouldn't they be out of a job if people believed that asking a professional bioethicist wasn't important?

One thing that talking heads never do is try to convince people that they shouldn't listen to talking heads. It's not just a matter of consistency: why would people try to put themselves out of a job?

How do we know that it's not just another priesthood: a profession that is useful only because people believe it's useful?