This is like saying put less gasoline in your car, since internal combustion engines are not 100% efficient, it won't make any difference enough to matter.
> our only true source of renewable energy?!?
These things appear to contradict each other. I also can't understand the logic of "we can't use nuclear power, but please don't stop the rays from nuclear explosions far away from killing us all". If my options are let the sun kill us all, or run a risk of nuclear meltdown here on earth, my vote is firmly in the "block out the sun and run on nuclear power plants" camp.