Oh come on. He's spent decades in the field as a nurse. He explains the latest literature on the subject in terms people can understand, and he obviously has the experience to do it. To dismiss him just because he's not a medical doctor is to ignore all the other medical fields. From what I've experienced, often times its the nurses who better equipped to understand the latest studies better than the doctors do, because they are more hands on. To dismiss so off-handedly indicates you are more politically motivated in your criticism than you care to admit. You are merely boosting for a "side".
By the way, he is merely pointing to the latest studies from the leading publications on ivermectin. He's pointed to both the good and bad. He even admitted that it's results were somewhat disappointing, but still showed a somewhat beneficial effect. And he points to the studies themselves.
Medicine seriously hurts its credibility when it doesn't report the shades of gray. When you don't do that, people don't trust it. Dr. John Campbell has proven to be a valuable resource in this pandemic, because he is playing it straight.