@OsoJr
That's how wizards do, they aren't expected to exclusively use spells. They usually pack a crossbow or a small sword when they run out of spells.
Although in some systems you also have level 0 spells, or "cantrips", which you can use practically indefinitely.
I think that the D&D system is fit for a game, ish, but not for a "game world" sort of a story. Taking these stats literally is just plain silly.