I have met this attitude often over the years and it bothers me a little. I believe that the most important think for any artist is to make an image that is the best that they can achieve at the time and given the circumstances. How they get to that image is not the most important aspect, assuming that no animals or humans were harmed along the way.
There are, and have been, some really excellent printmakers who make prints with the intention of hand colouring them. Margaret Preston (1875 - 1963) was a well respected Australian printmaker who made some really lovely prints, and enthused future generations of aussie printmakers.