This debate was getting a bit too heated for my tastes. But, here's my take on it:
For many situations, the average CCW holder is better off just getting away from a situation. If you stumble into a restaraunt where a "bar fight" is in progress, exit and call the police.
If someone starts talking smack to you on the street, avoid the confrontation.
If someone tries to start something while you are in your car, drive away. If they follow, call the police.
To me, deadly force is for the situation you can't avoid: The night a thug corners you in an alley, and there is no escape. The day someone breaks into your house, where you shouldn't run. The day that someone's life depends upon your action/inaction, etc.
A gun isn't to be used to prove who is more macho, or who is going to win a bar fight, or for the resolution of the proverbial pissing match that people tend to have with each other before a fight... If you can, just walk away.
Even as an off-duty police officer, there are many situations I have been in that I could have easily escalated. But, it was far easier (and safer, both to my self and my career) to walk away.
I think the OP's point is that sometimes people fall a bit too far into the "I'll shoot my way out" attitude on the internet. These situations should be avoided at all costs.
I agree that you have every right to defend your home, and not back down. I wouldn't back down against an intruder in my house.
But, I won't stay and fight with someone on the street for the sake of a little pride, with the price being the cost of someone's life (if it is reasonably prudent to walk away in the given situation).
No two situations are alike. Still, if I tried to define stuff outside of the home in general terms: I couldn't walk away from a robbery in progress (though I might if I had my family with me). I wouldn't walk away from a sex assault in progress, even if I had my family with me. And I couldn't ever walk away from an active shooter situation without acting. But, there are thousands of other situations where walking away would be the best course of action!
My ultimate point is: People need to think with their heads, not with their hearts.