It’s a specific procedure for a specific symptom where the disease harmed the olfactory area in particular. COVID can harm a lot of areas in different people and so far nobody has come up with a way to reboot all of them at once. In the meantime, research that focuses on individual areas can mitigate the misery. This surgery will help a significant number of people, giving them the normal safety against poisoning and a source of joy they had been robbed. Might even give them the hope they need not to choose death before other treatments get developed.