Even though essays may seem to be boring, they are a great. They are created with an objective; to prove something. That something might be a doubt you may have, or simply just another perspective. Essays will help us to be more critical, to "exercise" our critical thoughts. They also serve to express ourselves regarding X topic and to change our perspectives. Is a common knowledge that can be shared with everyone anytime.
Of course there are many other literary genres that are great such as poetry or historical fiction which (for me) are great, but to really think... essays.