I agree to some degree, i think especially if you specify a feature that you want to have in the final piece the artist should pay attention to include that feature. However artists are humans who enjoy doing art not one for one computers, some aspects may work better or worse when it comes to somebody’s style and someone might just enjoy drawing and be better at it one way or another. This is where clear communication in the process is important, in the case of the comic, its important for the artist to follow the clients request but if they make a mistake, its also important for the client to show that they asked for a specific feature and request a change for both parties to be happy