If you can replicate cooked food perfectly, will people still claim that "real" food, grown, slaughtered, and cooked, is "better" or tastes "more authentic", despite no technical difference?
Synthetic diamonds could, in fact, be in every way "better" (though hilariously, De Beers suggests a synthetic diamond "may not be forever"), but I won't be surprised if authentic diamonds remain the "real ones" long term. (After all, as we know, diamonds actually have no real value, it's all marketing.)