Kinda weird argument. The average actual distance of two planets on some orbits can be expected to be roughly equal to the distance of the farther planet from

Kinda weird argument. The average actual distance of two planets on some orbits can be expected to be roughly equal to the distance of the farther planet from the sun (because the max. distance is r2+r1 and the min. distance is r2-r1, so this type of 'average distance' is ((r2+r1)+(r2-r1))/2 = r2), of course with some variation because the orbits are not truely uniform nor truely random. The usual notion of comparing the orbit radii is way more intuitive, I think.