Yes, and once you know the truth, it's an irritant
to read the silly myth.
What if it persists because some squeamish people think having little critters buried within their beautiful pearls is gross? or marketing people think inserting a tiny chunk of tissue to start a pearl is unromantic? I think that's where you have to look, at marketing the truth in a more positive way.
Like 'Spin', hmmmm - instead of parasite, maybe "a tiny morsel of the mollusk's meal takes a wrong turn, and is misled into the mantle"...or
Instead of "2mm of the donor tissue" use cute terms like 'dab' or 'teardrop' or 'smidgin' of mantle tissue... at this point we need a thesaurus.
Spin, spin, spin. Find a way to take the truth and present it romantically, and the grain of sand will become a thing of the past.
Oh! maybe the 'grain of sand' is hanging on because it's easy for people to relate grain of sand with mega-irritant. Anyone who's gotten grains of sand in the eye or elsewhere can relate to a critter's urgent need to dispense with the source of pain.
Well, ultimately, I think it's the romance associated with sand that keeps the myth alive (ie the beach, the moonlight dancing on water, breezes ruffling the surface).
But, How About Those Pearls?! I think they're gorgeous with turquoise! I want the spiral cut one.