I understand exactly what you are saying - although mechanically it only takes a small amount of unequal pressure at either tip to create significant imbalance in the whole. Heavy pressure would be total destabilisation. Which also fits with your point.Taking the albatross metaphor a little mechanically further, although the wings are lighter than the body the extreme length of the wings still generates a considerable mechanical moment if any force is exerted on the wing tips, which will have a large twisting effect. So if a large force is applied at the extreme left or right wing, it can have the effect of creating extreme unbalance.
I'm making this up as I go, but hopefully you can follow my thinking in extending this to politics.
It is also, quite coincidentally, the same reason you don't get an albatross to carry your groceries if you have an uneven number of bags.
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