Hi @sponge-bob
It's definitely a big responsibility to know how to use firearms.
The analogy that you use of the saw and the firearms, can be used with any type of weapon that is for personal defense. in any case even a simple pen can be a weapon if you know how to use it.
It is good that they are interested in learning.
I have two girls, one is 9 and the oldest is 11.
Since they are women something I have taught them is self-defense, like defending against an attack by a man or someone stronger.
and even a pen can be used to defend oneself, unlike Argentina... In Venezuela we all run a lot of risk and more girls and women..,
It is much better that they are prepared.