If I have a gun that chances of my survival increase 100 fold so it is a matter of random chance and I will improve my chances of living by destroying at threat.
No, it doesn't. If you are alone with the robber and for some odd reason you are aiming at his head with a cocked weapon, then sure, you've saved the day.
If the robbers are running around and you are pinned down(most likely scenario) you're taking a huge risk by pulling out a gun. Especially if there innocent people nearby. ESPECIALLY if the robber is not alone. Life is not a video game, you dumbass. It's safe to say that you would be absolutely shock full of adrenaline in a situation like that and don't think for a second that you're going to have perfect aim and perfect consideration of those around you. You are taking a big risk.
Who said anything about being a hero? Maybe the guy doesn't feel like being robbed or want to play the odds like you and take his chances with his life. You think anyone that defends their lives wants to play hero
We could have talked about what could have happened all day long lets talk about what did happen , fuck hypotheticals
Again, it's all about randomness and probabilities. Just because all went "well" in that video doesn't mean it will for you or anyone else in a similar spot. You are thinking just as hypothetically as I am. You have for some reason(balls) deluded yourself into thinking that pulling out a gun of your own will solve everything.
"..my survival chances increases a 100 fold" ROFLMAO!!!
Weak , it's got to do with NOT being a victim and not allowing people to take chances with your life. You have a victim's mentality by stating the guy who decided to defend himself ( along with others ) is putting people at risk WRONG , WRONG , WRONG
Are you seriously arguing that him pulling out a gun and shooting the robbers didn't significantly elevate the risk of people getting shot? What drugs are you taking?
The moment these two clowns ran in with a gun and a bat THEY put innocent people at risk , not the other way around. You wanna play victim and hand them everything and hope they don't hurt you , you bend over and take it in the ass. I refuse to.
Sure they put people at risk. That's undeniable. But that old dude put them at a even greater risk, literally FORCING the robbers to either fight or flee. If they would have stayed and fought back, a lot of people would have been hurt.
What kind of man are you? fine just violate me and take my wallet and please don't hurt me? 
This just further proves that it's at least 70% an issue of balls and pride to you. Idiot.