They have been questioned by a lot of people, many of whom disagreed with them. If they were not questioned in court, it's becaue your boy Greer would not allow it. That way, people supporting his position could make vapid arguments like this.
First, Greer is not my "boy." You do yourself no credit with inanities like this.
Second, I saw a couple of these nurses on H&C, and they were not cross-examined as to their statements. In addition, they were fired from the positions at the hospice, which lessens their credibility.