CaptainProp has it right on the money. I did my original training on the A320 with an Airbus test pilot some 20 years ago and he always made the point that without hydraulics you are screwed because the flight controls will not move. Although we did carry out approaches to land in the simulator there in mechanical back-up, thats with hydraulics but no Flight Control Computers, and it was doable, they emphasised that mechanical back-up was there to give time to recover at least one FCC. There are way to many armchair pilots on here!