Merely carrying a firearm is using it! There's way more thought that needs to put into carrying a firearm than there is for any other item mentioned in this thread. Merely carrying a firearm requires the user to be . The heightened sense of self has a residual effect of benefiting other things you're doing throughout the day.
Most responsible adults can remain "on their game with respect to alertness, situational awareness, safety, and self-awareness" without resort to having to carry a bulky, heavy, dangerous, and expensive object. I also don't maintain any illusions that a firearm is going to save me in any likely event. I depend on my ability to be "on [my] game with respect to alertness, situational awareness, safety, and self-awareness".
The simple fact is that most people in the most dangerous neighborhoods are not armed. While a good percentage will be maimed and injured the vast majority survive without resort to shlepping around a hunk of iron. On the other side a good number of those who do arm themselves end up dead. Sounds more like a rabbit's foot, or fetish, than a tool appropriate to the situation.
I don't hike and camp much any more. Getting old has its down sides. But when I did I was always adjusting and revising what I carried. If I didn't use something on a couple of trips I left it behind because carrying things is not free. Every object and gram of weight extracts a price every time you take a step. If an object, any object, fails to justify the burden it imposes it got left behind.
Yea, I know. You are a going to object that I'm anti-gun. Except I own guns. I was considered to be a pretty good shot and still do well enough, better than most at the range when I do shoot. I even carried for a bit and made all the excuses you are about to make. Then I grew up and realized I was just being silly. There are times and places where carry makes sense but those are few and far between.
And no, the simple fact is that if you do not draw the weapon with a reasonable expectation of firing it you are not using it. You want ridiculous you could make the claim you need to carry a twenty pound life raft using the same logic. You never know, the water might rise and carrying a raft would certainly focus the mind on staying alert to any impending flooding. Better to have it and not need it than need it and not have it. Of course the same can be said for a space suit and anvil.