I believe that is an improper phrasing on Quantumental's part. No one thought, ever, (to my knowledge and immediately visible evidence) including someone like me who is completely unrelated to the discussion and has no idea who Max Tegmark is, that such a talk would not attract [any] people who share his views. This is not mutually-exclusive with "people of all distributions will be attracted in a population-representative sample", however.

To me, it just seems like an accidental (possibly caused by some bias its writer is insufficiently aware of) breach of the no-ninja-connotation rule.