Scars Unseen
Hero
Contrariwise, I'd rather have both magic items and spells put in the same category. No assumption of either. Give casters a few reliable tricks that grow on par with martial characters as current, and then anything beyond that is handed out as treasure with the same frequency as any other magic item. Have the especially reality breaking magic be tied to limited use items.Question for you then:
Why should the fighter need magic items to be effective while for the wizard, they're just gravy?
I much prefer to have the need for magic items be lessened so I can concentrate on interesting magic items that do cool/interesting stuff rather than items that just "prop up" the fighter. I hate the "need" for plussed items, weapons or armor - magic items should be fun and interesting not a necessary crutch.
Of course, I'd also want magic items to be significantly better than simple bonuses. At high levels, I'd want some weapons on bar with Fred Saberhagen's Book of Swords. Make magic items interesting, and make a toolkit as an example of how to make your own unique items.
As for why martials need external sources of power rather than internal ones, frankly, it's because D&D works on that assumption for the most part. Pretty much every D&D setting features mundane heroes with magic items to help them be effective except when either the hero is a magic user or the hero is supernatural in origin (e.g. Jander Sunstar, the elven vampire). Even high level characters like Drizzt rely on magic items to augment their skill, with their inborn ability being amazing, but not superhumanly so.