[... her first reaction is basically to just be like UH WHY NOT?? but there's a pause where she ... glances at Sakura, before formulating a ... more mature answer, lol]

Well, you never know what the castle will throw at us, right? So it's best to just learn all the stuff you can in hopes you'll be prepared. Sakura and I don't really know anything about heavier weapons since it didn't come up much at home, but it could definitely be useful in the future here ...