That value could be too low, but keep mind that:
1. 30% of salt intake, according to WHO's reports, comes from bread
2. A lot of salt comes from junk food / ultra-processed food. This is because the brain is wired to seek salt and ultra-processed food is engineered for overconsumption.
Cut the bread and the junk food and you'll actually have a hard time eating enough salt ;-)
When I add salt on my plate, people give me funny looks as if I'm going to die tomorrow, but most of my food is cooked at home and by my own estimates in most days I don't go over 2 g of sodium.
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Most people probably overconsume salt, but that's because of the junk food.
We also have clues that what might matter more for heart health is actually the potassium:sodium ratio.
Whole foods (meat, vegetables, fruits) are high in potassium and junk food is low in potassium. And eating more whole plants can probably balance a higher sodium intake.
But that's the second problem with the junk food that people are eating.
So the dietary guidelines aren't lying... that's basically their way of saying to cut the junk food.