If you can only communicate with maybe 10% - 12% of the population with no problem, then I don't think it's the other 90% with issues. What kind of feedback to you solicit? How do you react when someone says you're not saying what you think you're saying? Do you try to understand why people don't understand you and readjust what you're saying to make it clearer?
Well, if you read the majority of my posts, you'll see that I do do that. I've learned to predict pretty well how someone will respond and so I avoid most of the snafus nowadays. As my preferred style, usually I play by ear now, throwing out ideas in a more general sense and then clarifying when I get questions, rather than in putting lots of time in on the "perfect answer" and having the work be entirely wasted because I lost my audience at some point or miscalculated.
However, I still feel I have every right to simply "bemoan my fate" once in awhile, just so you know where I'm coming from.

I'm not suggesting other people are wrong, I'm simply expressing that, yes, personally, I do feel frustrating over this simply because of how I work... but it's certainly not an excuse to not change. As the communicator, I need to do what works for my audience, if I want to be understood.
Once you put something out in the atmosphere, you have very little control over how it's interpreted and that's something that needs to be realized before the communication process begins. No amount of preventive maintenance will stop people from interpreting something as they will. I don't think it's cold reality, as in something that's unwanted, it's a necessary part of reality. Multiple interpretations, even bad ones, make your idea stronger. You could get an idea you've never even thought of out of some alternate interpretation.
Yes, that's one thing I had to learn. Rather than trying to come up with "my" idea and my "solitary" interpretation, I benefit more from the feedback . I love getting surprised. Still, it takes awhile for a solid I to learn this sort of thing and then appreciate it.
You are exactly right. This is why presentation matters and when people denigrate the importance of this, it becomes counterproductive to your own goals. This seems so obvious to me that I don't even think about it that much.
Yep. Well, remember, that's how your personality is slanted. For an INTP who naturally is just seeking to "define the nature of things," it takes a good bit of readjustment to CHANGE and instead focus on communicating the thought to a particular audience.
Not an excuse. Just that it's something you do naturally, while I had to learn it.