Xiao Li said to Xiao Zhang, you eat less pickles  If you eat too salty at ordinary times, you will get high blood pressure in the future  Xiao Zhang retorted: whether you eat salty or not has nothing to do with high blood pressure
You see, people in the 1950s ate pickle bumps every day, and not so many people have high blood pressure now
In the past, medical conditions were backward and people's health awareness was weak. Even if they had high blood pressure, they did not know.