An essay is also an artistic-publicistic genre that is widely used in the modern world, in print and literature.
Instead of facts, the original thinking of the author comes to the fore. Now you do not need to run on the Internet in search of topics and informational occasion. Here the reason is also present. But this is more likely just a college papers, some kind of topic for which you jumped and decided to speculate.
Here you show your intellect and emotions. This is an option to show your syllable, because you are not limited to a specific style. You can use any expression and all the colors of the language.