Almost everything interesting that is above chemistry[1] in the science hierarchy has complex causes. It would be a good thing if people in those fields would get over their physics envy and try to communicate this fact to the public better. The number of "this flawed study suggests that some small minority of people might be a bit more healthy if they restricted their sodium chloride intake" becomes in the general population "eating less salt is good for you". And foods can somehow be labeled "low salt" when the manufacturers lower the sodium and jack up the potassium (both are salts) level to keep the taste close to the same.

[1]https://xkcd.com/435/