"Every X should Y" is a succinct way to say "Doing Y helps strengthen or create skills that are useful in doing X, X and Y are related on a fundamental level, a

"Every X should Y" is a succinct way to say "Doing Y helps strengthen or create skills that are useful in doing X, X and Y are related on a fundamental level, and those who do X are rather likely to enjoy doing Y because of that relationship." Naturally, the article goes into the nuances of the subject.