You have likely tried writing a haiku. Even disinterested readers know a haiku when they see one. The world itself is well aware of the exceptional compression and excitement of the haiku.
Children write haiku in elementary school.
It's good practice to write haiku. The haiku is the world's most popular poetic form after the sonnet. No missing those obligations. Perhaps the best reason is a historical one, a cultural study that involves ancient Japanese politics and hierarchy. The holders of power solicited the tanka to symbolize that upper echelon.