Hi again,
A common theme here is the dislike of/uncomfortable feeling with promotion, the limelight, making yourself a commodity.
First, know that this is very common. However, Jackfish, you hit it right on, no matter what product you have, if you want to sell it, people have to know about it and be encouraged to buy it. It doesn't work any other way whether it's books, candles or computers.
A few other thoughts:
1. If you're in this situation, do you really want to write to sell? It's okay to write just to enjoy it and share with family/friends.
2. Would you feel more comfortable writing some stuff to sell and some stuff just as a creative outlet?
3. If you need to sell and you aren't doing as well as you'd like, can you partner with someone who is stronger at it whether they're local or can help you online/in other locations? You still have to be involved, but that might take some pressure off.
Writing can certainly be considered an art, however, making an income from it is a business no matter what. I hope you'll continue to look at your strengths/comfort zones and keep working to make marketing fit those attributes as best you can.