For Karl!

My dude you don't play enough games with looting mechanics if you haven't run into several variations of "this thing has no pockets, how is it carrying a bazooka?"

The last bit is just a deviation used narrativley at times to add in an extra joke layer. It tends to make up for the need to shoehorn it with the comedy of the statement. In this case, that ten random gems enhances someone's sword and alludes to the fact that, in a very narrow view, these mechanics turn players into little loot goblins searching for random crystals inside dead things to improve items.

OP did a mash-up of video games and real life to turn the absurd logic that results into a joke. You're just taking it too literally. And I say that as someone who often does the same.