It's simple. When you're in a panic situation with the plane diving for the ground (real plane or RC), and someone yells "pull up. pull up!", do you really want to have to stop and think, "let's see, to pull up I have to push the stick".

Or you could think about it this way; you're in the cockpit of a plane and it's heading for the ground in a screaming dive, you're in a state of panic and in fear for your life.... Is your natural reaction going to be, lean forward towards the ground, or lean back away from it? And how would you have the best chance of fighting the sticks to level the plane; pushing forward with your arms, or planting your feet firmly against the instrument panel, grasping the yoke with both hands and pushing with your legs to get elevator control. [:@]

I'm joking, but it makes sense to me.
Dennis-