There's a reason why most people don't write books or blogs, or keep journals.
Writing is hard.
Writing is hard because it requires you to lay out all the convoluted mess in your brain and form it into neat, flowing paragraphs. This is why it is abnormal to be a "natural" writer. Most people we would call natural writers began writing at a young age; they too probably struggled thinking their writing was nothing compared to the authors who were giants in their day.
I write, however, because it is hard. While it may not always hold true, many of the things that challenge me the most are the best for me. Where does growth come from anyway--living the easy life lounging on the couch at home? NO. I am no great person by any means, but perhaps I can grow in my understanding through writing.
So I write this as an encouragement to all you "writers" out there. You amaze me. What you may think is naive may intimidate someone else who reads it and is blown away by your depth. Develop your ideas through writing and don't be critical unless someone asks for it.
Writing is hard, but writing is good.