@TooOld2HikeQ So there's 2500 mountain lions in Arizona and 7 million people. And there's a single (one) report of a mountain lion attack on a person (which was non-fatal, and was thwarted without the use of a firearm)? From a pilot's standpoint, I think the odds of multiple system failures simultaneously occurring on your aircraft causing a fatal crash is a higher likelihood scenario than a mountain lion attack. But a pilot with a lifetime of education, training, and experience with the redundant safety systems, checklists, and protocols of piloting an aircraft is probably more comfortable with those risks than somebody with less experience with the risks associated with wildlife.
Something to keep in mind is to take a topic that you have a lot of knowledge about ... such as aviation. When an incident occurs that makes the news, how often do you read the article and find it to be incomplete, inaccurate, perhaps misleading, sensational, or obviously written by somebody with a poor grasp of the subject? A picture of a 737 accompanying a story about an A320?
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... take this lesson and apply it to subjects which you might not be as knowledgeable. Youtube videos and blogs are only as accurate as the person who publishes them. Even reputable news organizations publish stories that are often lacking in context.
Rattlesnakes, bears, elk, mountain lions, fox, raccoons, skunks, etc. should not be ignored nor taken lightly. But their danger to a hiker or backpacker like you and me is generally exaggerated or sensationalized by people who rarely have a good understanding of their behavior.
If you feel more comfortable carrying a firearm, by all means, go for it. But as a pilot, I suspect you spent countless hours in a simulator practicing for emergency situations you might encounter in flight, and I'd recommend you spend a similar amount of time at the range practicing your marksmanship.