alm,
Firstly, I think that anyone that doesn't understand this rather complicated argument about this "trivial" circuit is welcome to seek clarity and correct apparent confusion about what is actually happening in this circuit.
I don't think you quite understand the problem,
If any single diode attempts to take some more of its share of the input-shorted discharge of an output capacitor, then it's forward voltage rises causing all other diodes to be biased forward to share the surge current.
The forward voltage of the protection diode rises in a few nSecs in respect to current, while the thermal 2.2mv/degC effect takes some much more time, making all the other protection diodes the shortest path that electricity likes to take.