Coloring, of course, cannot be banned. You should not exclude its use for fine motor skills; this activity allows parents to get an extra half an hour of free time.
There is no artist, who would buy their children coloring books or taught to paint pictures. What does this mean? Coloring is a kind of framework, hindering the development of the imagination. They contribute to the formation of habits of the finished drawing, in which a flight of fantasy and free creativity is almost impossible.