When the ships of Chinamen start hitting the west coast, the ground crew guys are going to wish they were a little more proficient with a rifle.
Just today, I was reading about the operators of those Israeli border cameras near Gaza when their base got overrun. Nobody thought they'd need rifles, either.
Like we all say in a slightly different context, better to have and not need than to need and not have. That goes for small-arms training and equipment for REMFs, too.