White Knight Charges question

Why exactly do the charges add to the "magic" stat instead of attack? It kind of perplexes me.

Because Nexon fails.

Nexon thought White Knights would use intelligence and matk, but removed the idea. Charges did not change, however.

I heard in beta casting the charge hurt monsters around you for a small amount. This is obviously no longer true.

Was 3rd job even in the data in beta? I know it was released december 2005, so it was definitely not playable in beta, at least by normal players.

I believe it was tested in KMS 3rd job beta, then removed before it made it to any actual version. Like how Inferno used to have a platform-burn property. (not sure if any remnants of that are in the data)