And yet, in real life, you can see so much more... Individual rungs on ladders, individual wires, individual windows, portholes, hatches, and even weld lines on turrets and what have you:
And comparing the destroyer to an airplane is only a way of illustrating the change in LOD. It doesn't compare to planes at all.
IDing a con even at max zoom is difficult, especially considering the black and silver shadows that most seem to have (LOD bug that's been around since 2.06 or so!) that cloud the textures underneath it, giving only solid shapes with no color to deal with.
Somebody posted a screenshot once in one of the millions of "no icon" threads that all popped up around the same time, and asked them to ID the plane, the range, the orientation of it. It was in a dogfight, within guns range, and I don't think a single person got it right. It was under 800 yards, and was a 109. I tried to search for the thread, but couldn't get the keywords right for the search tool to work. Oh well.