User blog comment:DancePowderer/Deus Ex Lacrima/@comment-3290324-20140209023110/@comment-7418318-20140209094539

We do know, or rather can infer, at least one limitation. Lacrima despite their many uses are in some way not good, powerful or flexible (or a combination) enough to replace mages, so to say. Or they need a mage to be created or adapted into their intended use.

Otherwise the guilds would be filled mainly with normal people wielding Lacrima instead of being filled exclusively with actual mages, what with there being nine times as many non-mages as there are magic users in Fiore.