I agree, sometimes you just dont need to guide the board, the mountain will push you where it wants. You follow the same path a ball would if it were rolled down the same slope.
When you need to make a correction you can apply pressure to or engage an edge.
you can't compare a ball with a snowboard. if you want to let mountain push you where it wants to, be my guest. just know that either you aren't completely flat basing or you will catch an edge big time eventually. that's really all there is to it.