Center for Science in the Public Interest (CSPI) recommends keeping sodium around 1.5 grams a day (1,500 milligrams). Their diet recommendations are sometimes too stringent for bodybuilders though. Still, you are way above their recommended amount. And they say the average American man eats 4 grams (4,000 milligrams) of sodium a day (and the average American diet is probably pretty bad). So you are eating double the sodium of the average American fat-ass Mickey Dee's-loving dork.
Even if you have normal blood pressure now, it tends to go up as you get older, after long-term excessive sodium consumption. And there is something called pre-hypertension (readings in-between optimum and high blood pressure) where your risk of heart attack and stroke is increased. So excess sodium isn't as benign as some people think. Personally, I stopped adding salt to any recipes, and I try to avoid processed and packaged foods (which can have a lot of sodium).
But I'm a little older, from the Peary Rader ("Iron Man" magazine) generation where people who trained with weights were also interested in healthy lifestyles. Todays younger bodybuilders might not share those same health concerns.