Well an apples to apples comparison would be a rusty or dirty gun, which is way more likely to simply not work than it is to malfunction in a dangerous way. A rusty old car has multiple failure points that are dangerous to people who aren’t the driver.

As for user competence, I would love to see firearms training become a standard class option in high school, just like driving is now. I’d rather we had a society where neither were necessary, but we’re not anywhere close to that ideal on either front.