Pulse -
"some bad guys get guns here, but the percentage is way lower". Do you have a source for that stat?
"big man carrying a gun" - That's a guy thing, not specific to America. But, to generalize 'because gun therefore' is bullshit.
"Somebody else will take it too far" - Yep. Morons everywhere.
"Guns are in 'bad guys' hands because they're so easily available." - Sounds intuitive enough. Source?
"The amount of shootings we have compared to the US is astronomical." Yes. And strangely, living in one of the safest cities in my state I see none of it.
"I'll take the chance I can beat him in a fist fight or knife fight if required." - You must be a real bad ass, Pulse. If I saw a hint of that shit coming I would be gone in a flash. There are way, way too many unknowns and factors beyond my control. If that happens to me it would probably be an ambush. Then, FUCK! I'll do what I can. Or, are we back to that guy thing.
"if it happens to 10 people a day, it's 10 people too many."- Duh. <--Translation: Yes: of course; really doesn't need mentioning.

For me, I'd rather have a gun and not need it, than need a gun and not have one. I do not carry. But, I would if the location warranted it.