Apple's and oranges. I've never been armed with anything other than my dog in any urban environment (Chicago, NYC, AD, LA, Oakland, Seattle, DC, etc... ), and don't bc ski with anyone I think is going to mug me, so I don't imagine that I'll be using avy gear to protect myself from other people anytime soon. I've never thought about protecting myself from others on public transit or at home with a fire extinguisher either, but I guess I'm just not that worried and/or lack imagination, but if you want to carry, go for it.
That said, I gave up road riding in Snohomish co. just north or Seattle. Way too many angry bike hating F-150 drivers. Anyhow, I don't want to get into a second amendment debate as that's not what's being alluded to, questioned, or discussed.
Animal wise, we just had a mtn biker killed by a mountain lion... I'm guessing the odds of getting hit by lightning or winning the lottery are orders of magnitude higher. If I were hiking in a 'lot's a hungry bear' area, I'd think about carrying, and my irrational fear of sharks kept me off of surfboards, that's for sure.
It's not apples and oranges at all. It's having the means to deal with a particular problem.
You can be dependent on someone else to solve your problems or take on the responsibility to help yourself. For me it's not even a choice!