I think that most people are unaware that setting the WB in the camera has no effect on the RAW file. When you open the file in ACR it reads the camera data and sets the white balance that you set in the camera. Therefore you can set it to whatever value you want when shooting but it doesn’t get ‘actuated’ in RAW until it’s processed. The only value I see in being specific in the camera is to remind you what you wanted when you shot the image.
In my mind there are two kinds of image. The first are natural scenes and the second are artistic expressions or abstracts of the scene. For the second type of image I use the WB as a step in the color cast I want to give the image - either cool or warm. There are a number of ways to achieve this but WB is one of them. Even natural scenes require some WB decisions. Some people make fog look bluish and others choose to give it a warm cast. I would not fall into the trap of spending a lot of time making the image a faithful representation of the subject. Our minds compensate for colors we see in nature.