User blog comment:Miskos3/Fairy Tail 544: You're the King, Review/@comment-4933386-20170714090726/@comment-7418318-20170715080144

Well said.

As for the matter of non-mages supplying magic power, I don't see a problem with that. In Earthland everyone has a magic container, it's just that the majority (70% was it, right?) lack either the talent to use it or could potentially become mages, but simply never learn how to. That doesn't mean they don't have any magic power inside their bodies.

After all everyone in Magnolia (save for DS, Exceed and Mystogan), mages and non-mages alike, got gobbled up by Anima and turned into magic-power supplying Lacrima.

The only possible exceptions to this are Porlyuscia, since as an Edolasian she really shouldn't have a magic container and possibly Chelia since we don't know how exactly she lost her magic. So the only potential mistake in this link is Porly, but then she is a master Alchemist and lived in Earthland for a long time, so it's not impossible for her to have found a way to either implant herself with an artificial container or stimulate the growth of a (more or less) natural one.