Comment by antirez

Because there were plenty of evidences that the statements were either not correct or not based on enough information, at the time they were made. And to be wrong because of personal biases, and then don't clearly state you were wrong when new evidenced appeared, is not a trait of a good scientist. For instance: the strong summarization abilities where already something that, alone, without any further information, were enough to seriously doubt about the stochastic parrot mental model.