I think "If water kill your child / Water you go use" is fairly profound, and a good demonstration of the idea that the pidgin expression refers to. And it rocks, of course.
I think the point of the song is inevitability (in the context of African liberation). The idea being that Africa is indispensable to the world and will eventually overcome.
But I can declare with 100% confidence that this song *rocks*! Go check it out.