Throughout history, at the verge of every major technological breakthrough were skeptics and critics just like the above saying that it couldn't or wouldn't be done.
Anyone with half a brain knows that we aren't done making new discoveries and new breakthroughs so why should EESTOR'S quest be any less possible than the moon landing, the microwave oven, the airplane, the light bulb, nuclear energy, organ transplants...the list goes on. If Eestor doesn't do it, someone else will so open your mind a bit and realize that as much as we know and as far as we've come, we're just scratching the surface of our potential. Anything is possible.