"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.

Every schizophrenic should take their medication. Every small child should ride in a carseat. Every forest camper should be careful not to spark forest fires.

Every argument should have nuance.

Nuance is the enemy of persuasion.