I disagree. The very rich can be stupid—because of entitlement and vanity. They also become weak and helpless from the luxury. And they can’t handle being alone. I don’t think they’ll last an hour after TSHTF.
More like death by softness. Prosperity kills when you use it for self-indulgence. You lose your edge.
I agree a lot of them are stupid. Mostly the ones who never had to earn their way. That being said many of them are ruthless, conniving sociopaths who enjoy power games like other enjoy playing chess. For one the builder of that place would have hired good people to advise of security and they would have thought that thru if nothing else.