There is a reason why there's a cap on words limitation. It's to make reading of articles easier, especially when there's a need to start a new post. It's akin to taking a break once in a while after reading.
There is no need to post the whole article. If you want to draw attention to a long article, simply post an extract and then provide a link for those who want to read the whole thing.
The reason why there is a limit is simple. It has nothing to do with being retarded. It's because forum resources are finite and cost money.
If a 20,000 word article was posted, it would take forever for the thread containing the article to display and loading the page would consume large amounts of bandwidth.
I have bills to pay at the month and I'm trying to keep them as low as possible.