Experts can be wrong, but there are limits. There has to be some line that a person can cross, whether through duplicity or ineptitude, that strips them of their status as “expert”, otherwise the term loses its meaning and we are talking about something more akin to a religious figure or royalty.

When someone is completely wrong on a matter that is central to their supposed expertise, and there are terrible consequences for humanity, they shouldn’t get a pass just because they went to Harvard or wrote some books or held important positions in the government. That doesn’t mean it’s better to listen to Dr. Oz instead, but it is better to find new experts to listen to.