"Why on Earth would we leave our homes and sail across an uncharted ocean where we might fall off the edge and perish.
"Why would we build railroads that travel at speeds that would kill us?"
"Why would we wish to leave the bonds of Earth for the sky?"
"Why on Earth would we try to break the sound barrier when the speed would kill us?"
Why would we leave the Earth bound for the moon - we could never do it - and didn't?"
Man needs imagination and balls to progress.
Balls without brains is a raging bull.