Do you guys take all this that seriously?...
Well, obviously we all take it all somewhat seriously because we keep, maintain, and carry guns for self defense. We (some of us) then judge those that don't carry enough gun to be unprepared (be it caliber or number of rounds in the gun or on the person). We judge those that carry too much gun(s)/ammo to be fantasy-driven hero wannabe's or paranoid lunatics. To be truly serious, you have to carry what the group think believes is the right amount of gun and firepower. Oh, and you better carry it in a manner the group think approves of or you are being irresponsible.
I liken this back to the discussions of ballistic vests. If you carry a gun, you are prepared. If you happen to also have a ballistic vest, you are paranoid.
No, the little Kel-Tec P32 with randomly distributed non CNS shots probably isn't going to quickly put down the deranged and violent guy on PCP who has decided to fight Satan and that I am Satan. No, my 5 shot Charter Arms revolver isn't likely capable of taking out the team of 9 well armed home invaders that just broken down the front door of my house with a stolen SUV. Those are just risks that I am willing to absorb.
However, as the NRA stats show, having a gun (not even shooting it) stops far more crimes that people who actually pull the trigger. Lots of people win confrontations by pulling the trigger and yet completely missing the bad guys. These are all psychological stops and that seems to be what wins the vast majority of situations. Then another amount of people stop criminals with largely non-lethal hits (despite trying their best to kill the bad guys). Only rarely do non LEOs get involved in prolonged gunfights involving lots of ammo. Yes, it happens, but it happens extremely rarely, but when it does, the really serious people claim victory for their justification of what anyone that doesn't have at least 30 rounds or more on their person at any given time isn't truly prepared.
The reality is that most of us do not attract the kind of attention that would warrant overly high levels of preparation. Most of us are not diamond merchants or the heads of large corporations. There is nothing wrong with amping up your self defense game. The life of a poor guy just scraping by is equal to that of the guys that hold the secret formula for Coca Cola. Do what you think is best for you, your piece of mind, and your quality of life.