Yes, it is true....

No matter how good, bad, or indiferent the builder and pilot are, they can not escape the laws of physics.... and gravity.

It is obvious that you have never balanced a low wing plane, so I am guessing that you have a high-wing trainer. As an experiment, try to balance your high-wing trainer upside down.... and you will discover that it will never balance, even on the exact Center of Gravity. This is because the center of gravity is above the pivot of the balance system, and it will "fall off" the pivot. Balance the plane the right way up, and the CofG will be below the pivot, and your plane becomes stable even when it is not pivoted exactly accross the CofG (it will just be nose-up or nose-down).

Believe it or not, but the laws of physics apply to both high, and low wing planes.... It is really hard to balance something on top of a pivot, but much easier to suspend something from a pivot.

I am trying to think of an every-day example .... when you carry a ladder, do you go to the middle of the ladder, lift the ladder on to your shoulder so that the bottom side of the ladder is on your shoulder, or do you lift the ladder, put your arm between the rungs, and put the top side of the ladder on your shoulder? With your arm through the ladder, the CoG of the ladder is below your shoulder, and low-and-behold, the ladder can balance on it's own. Put the whol ladder on your shoulder, and the ladder will not balance at all...

gus

P.S. Of course, your post may have been a troll, and if so, it was a good one .... Then again, people from down-under may do things upside down.....