I keep a fire extinguisher in the cars, all over the shops, strapped to the tractor, in the house ect.... just in case.
But I also dont leave a bucket of open acetone sitting where im going to blast grinder sparks...
best way to not have a fire is to take steps to avoid high probability scenarios. But the odds are never zero, Iv got them in many useful locations to prevent the worst.
Same with my guns.
But guns are more fun to shoot recreationally than fire extinguishers lol unless your shooting a fire extinguisher with a gun... but that makes a hell of a mess.