I believe that the main reason for this is the misconception in defining what HDR actually is. Somehow, there is a notion, that HDR is a new style in photography, which is completely false. HDR is not a style or genre; it is a technique of post-processing. It is a tool. The way the final photo looks is absolutely up to you, as you have full control over the entire process.
There are many different tools and techniques for creating HDR photographs and each one has its own advantages and limitations. If you are going for a surrealistic, edgy look in your images, Photomatix is your best friend.