FWIW, my wife is one of those people who are sensitive to salt...only in her case she's DRAMATICALLY sensitive to salt. She tries to keep her salt level at about 300 mg/day. I worried that this was dangerously low, but her doctor, after studying her blood level, said that she was keeping her sodium at precisely the correct level. This despite being on really aggressive diuretics (so much so that she is prescribed potassium supplements twice a day).
OTOH, I don't follow her diet, and probably had better not. So I use soy sauce and Tabasco sauce (green), and order things with normal spicing at restaurants. Most people would still consider my diet generally low sodium, but there are degrees and degrees.
My real point here is that different people can have quite different dietary needs. Don't assume that because something works for you it will work for someone else. It might, but it also might not.