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a reminder, to those who live in a nation where firearm ownership is commonplace - even if you have no intention of owning a gun or having one near you for any reason, it is important to understand guns. in the united states, if you do not know how to operate a gun, it is statistically likely the person next to you does.
even if you will never pull the trigger, at least learn how to unload a gun. completely. on most kinds, it's more than just dropping the magazine.
even if the movie fantasy of being able to steal and field-strip an attacker's gun is highly unlikely for 99% of gun varieties, knowing what a shooter needs to do in order to use his gun is useful for knowing how to prevent them from doing so, how to make a gun (relatively) safe.
If the worst of the worst of the worst happens, knowing how to fire said gun may be useful, but more important than that IMO is knowing how to *stop* said gun from firing and endangering anyone else.