If we are going to start discounting economists based on failure to correctly predict things like - interest rates - then you’re going to be chopping the entire mainstream field. If any economist was ever beholden to making accurate predictions, the field would currently be vacant.
Why did he decide to make these predictions if his ideas supposedly have no bearing on how predictions are created?
Does economics no longer even have the pretense of being a science, which by its very nature exists to make testable predictions?