I understand from a handler running a bird dog why you would disagree. Putting this comment in context is about sending a retriever to find a bird.....a blind if you will. That was how it was intended, it's actually a saying fairly common on the trial circuit.
I am not taking anything away from their natural ability to find a bird(nose,range,etc) but rather to focus on their ability to trust and take directions enroute to a known destination. One of the important skills retrievers must have. If you ever attended a retriever trial you would understand the intended context.
This is not about old school approach or not.