>>718079768
>Anon, you just described something being overdesigned. If you have to come up with a lore explanation to cover the parts that make no sense,
It's not lore, you can literally see it happen in gameplay. Shit just slices through things with magic because it's a fancy magic sword.
Also, strictly speaking, the Keyblade is specifically designed to be used as a focus for magic, whether by casting spells or transforming it into other weapons. Using it like a sword is the "default" that you're only supposed to fall back on if you don't have any other options, Sora just got really good at doing it because he's a retard savant.