Congratulations, you're smarter than a Harvard professor. I noticed the same thing, so I'm also smarter than a Harvard professor. I would hope that everyone on this site is smarter than a Harvard professor. A Harvard professor who got his B.A. and M.S. from Yale and his Ph.D. from Harvard.
This is sociologically interesting: is it an isolated incident that a Harvard professor -- an award-winning one, no less -- would so loudly fail to comprehend how science and statistics work? That doesn't seem likely, for two reasons. First, he probably talked it over with other people in the field, or at least mentioned why he thought replication was bad and wrong, and no one talked him out of it. Second, the system he came through produced him, and it's unlikely that that sort of error would only be produced once, since education is fairly standardized. So: what does this say about the relevant institutions? (The social sciences, HYP, academia, etc.)
I don't think that means you are smarter than that Harvard professor. He is a very successful person and has reached heights coveted by many very smart people. It just means that the game he is playing is not one where you get ahead by saying things that make sense.
For example, if you listen to a successful politician and spot a false statement he utters, that does not mean that you are smarter than that politician.
Jason Mitchell is [edit: has been] the John L. Loeb Associate Professor of the Social Sciences at Harvard. He has won the National Academy of Science's Troland Award as well as the Association for Psychological Science's Janet Taylor Spence Award for Transformative Early Career Contribution.
Here, he argues against the principle of replicability of experiments in science. Apparently, it's disrespectful, and presumptively wrong.
This is why we can't have social science. Not because the subject is not amenable to the scientific method -- it obviously is. People are conducting controlled experiments and other people are attempting to replicate the results. So far, so good. Rather, the problem is that at least one celebrated authority in the field hates that, and would prefer much, much more deference to authority.