I saw this a lot while looking at Visual Studio vb.net trial projects. All I was trying to do was draw a line on the screen, and there were all kinds of canvas's, paint brushes, line types, ink colors, etc... it was quite overwhelming.
So I'm guessing they included only a workable subset of the framework as to not overwhelm a smaller device with less memory, less storage and a slower processor and hardware. I guess they had to draw the line somewhere. One man's node color is another mans paint brush ink color