A few brave scientists even appeared onscreen to say that sugar not salt was the real problem. At the time though there was less hostility to sugar so the salt restrictions went into force and I believe the sugar lobby even were able to squash a few reports condemning excessive sugar intake.
It's so ingrained in many people that reviews such as this one will not change their attitude.
Also, they will tell you need to drink lots of milk to keep your bones strong. Also a piece of "science" on it's way out.
"During the past 30 years, the one-third decrease in the average salt intake has been accompanied by a more than 10-mm Hg fall in the population average of both systolic and diastolic blood pressure, and a 75% to 80% decrease in both stroke and coronary heart disease mortality in Finland."