I agree... somewhat (and only for local use) but honestly, can you tell me what the difference is between these 5 colors:

#000001
#010000
#000100
#010101
#010001

And if you can, just by looking at them, then you may want to call up Guiness because your eyes are more sensitive than that of any living creature on Earth. The fact is, for use in text RGB is overkill. RGB was designed for images, that is to blend and allow transitions, such as in a gradient. It was not designed so you could have millions of different colors to use in text. I agree that for local use it should be expanded, perhaps to a set of 256 colors, but I really fail to see why black is unacceptable and instead you need to have #000001 as the color, or red is unacceptable and instead you need #FF0001. To the human eye, they look exactly the same.