I understand why rare items usually aren't meldable, but at the same time it's annoying. Why not allow melding but cap it at a single materia?

(The idea is, these rare drop items can be made with higher stats such that you get a good item without having to do anything to it, or you can choose to go for the (mostly) crafted item that is easily obtainable but you must risk breaking to make stronger than the rare item)