I'm not convinced that peppers are as prepared as they think they are. Post-annihilation we need people who build civilization, not that hide in holes. Good luck living in a shipping container surrounded by a few inches of Quickrete from Home Depot while a hungry mob led by the most charismatic survivor looks for a way in.
I mean, this topic is pretty far from any reasonable assumptions, so if you want to base your doomsday survival plan on charging into the killings fields of a crazy dude with pallets of ammo and AR-15s be my guest.
I was just highlighting the point that some people are exceptionally over prepared for just about any scenario, not trying to argue the merits or morality of it.
None of them seem to account for human spite. After a certain point survivors might just try and seal up the bunker entrances or cave in a bunker entirely, or at least use the possibility as a bluff.
That seems like a perfectly reasonable angle of attack, but the number of assumptions in play make the whole thing meaningless.
My original point was only to highlight that certain people really are almost hilariously over prepared for just about any eventuality, and any assumptions made should probably take this into account. I wasn't suggesting they were right, or wrong.