It's not a "or", it's "and". Steroid use is very common among celebrities, especially male action stars. Celebrities have physiques in time frames and at ages that just aren't possible otherwise.
No hate to them for doing it. But it's important that we're at least honest about it because of the effect it has on people's (especially men's) own body images and ideas about transformations. Losing 60 pounds while packing on muscle in 6 months at 38 years old is not possible without gear.