You can't shape your muscles with steroids either. If your genetics do not support great-looking shape then steroids isn't going to help you. I knew some redneck boys when I was younger who liked doing steroids and their muscles got huge but they didn't look good. There's a difference between having large muscles and having aesthetically pleasing muscle shape. A lot of these pros to end up doing steroids would have looked good even if they had never done steroids. They clearly have good genetics with a frame that's great for putting muscle on. Personally though, I don't think huge steroid guys look good. I'm sure Serge Nubret (who looked awesome) used some steroids, but he's not a walking chemical factory like Jay Cutler, ect..
You can do bodybuilding training and improve the size and quality of your muscles but you cant really alter their shape. For example, doing concentration curls isn't going to make my biceps peak any larger. But I can try to develop my biceps to the best extent of their genetic potential. Luckily for most people, if you do bodybuilding training and build your physique, your muscles generally look good (we are all the same species after all). But of course some people are going to be able to pull it off better than others. That's just the way it goes. This is only troublesome if you're a professional bodybuilder. Otherwise, no matter how much you think it is, it's really not that big of a deal.
We guys who bust our butt in the gym to look good think it's a big deal, but to most regular people, they don't give a sh*t.