No, you are totally wrong on this, Richard !
I see, you are a bad structural engineer ! LOL
In reality there is almost NO space / air between the columns for the wing (and the tail) !
I vote with Richard here. There's plenty of air (or actually, window glass) between the columns. No need to be qualitative, and talk about "plenty" vs. "almost no" space. One could measure the relative proportion of air and steel from these photographs.
I made a small illustration for you :
No damage by the tail? Quite the contrary!
YES, MUUUUUCH stronger !
Again I doubt it. Steel may have more strength per volume, but the wood is thicker. As Richard explained, the mass also matters in impact situation.
Do you know how to do these computations, Suchender? I've been through this in engineering school, have you?