Well, while some people have the knack for writing interesting and provocative essays, others do not have that refined skill to do so. Writing well usually takes a lot of investment, including reading lots of content and having a critical thinking. That skill can be learned, just like doing magic tricks, developing persuasive communication or cooking palatable dishes.
The reason why it is hard to write sometimes is that we reject ideas that are deemed nonsensical. It is better to type out any idea that comes into your mind than to wait and ponder which words to choose and construct. It is also because we do not have a goal in mind, which can be remedied if we want to earn revenue through our writing content. In that way, we will strive to write better because we are motivated, for money.