If you can hit a keyword and get straight to the point on a particular topic, what's the point of stressing things?
The more you write, sometimes it complicates things without the author even realising it. At the beginning, most of the long text might have meaning, but the more you read it, the more confused you get about what the person is saying.
The problem is that you make it too concise or too short that there's nothing worth discussing on your topic, you will always end up getting that post deleted and since there's really no metric of what's the acceptable length for a thread starter, it will always be a guessing game for the newbies but that's not even an excuse anyway, I mean there are other things that you can do to improve how you post, just looking at what the other people post here in the forum and you would easily differentiate the mistakes that you've committed. Totally agree that the more you right, the more you complicate things and in some cases, hyperfocus on one subject without expounding on it to further improve your point, maybe knowing when to get to talking and when to do less talking, you'll probably going to see the improvements.