See my post above. All Kennedy has to do is spout off a bunch of nonsense that people think sounds good, While Dr. Hotez is left trying to disprove a bunch of quackery. It's an impossible task, and someone as slick as Kennedy can make almost anything sound credible to people in desperate need of answers. It simply lends a higher level of credibility to someone like Kennedy. There's a reason courts put controls in place when examining issues such as this.
And again, should we have an astronaut on Rogan to debate a flat earther? Why not? There are tens of thousands of people who think the earth is, or might be, flat. All a flat earther would have to do is claim the photos from space are fake, and then make a few outlandish claims, and suddenly some listeners will start questioning their own belief that the earth is round.