Consider: if a 'lifeboat' float had sufficient buoyancy to carry 40 people without being submerged and that resistance to submersion was instead directed into a pump by the rolling action of the ark then poo you would most certainly pump.
If "resistance to submersion" were redirected into a pump, instead of being used to resist submersion, then the lifeboat would sink. Once it sunk there would be nothing there to help the pump.