The posting was not clear as to whether the question was referring to the technical capability of a zoom, or the artistic process of using them. And the answers have covered both areas. Technically, a modern zoom is probably as good as a prime, but rarely as fast. But I have to give the winning vote to the comments about composition. I have the Zuiko 28-48mm and a couple 35-70mm (including the legendary f3.6), and rarely use any of them. You should be viewing the world for the lens(es) you are carrying and look for compositions that work well for that lens. Nothing marks a snapshooter faster that standing in one place, zooming the lens in and out.