Well no, not really. When ZBrush originally came out, it was an illustration tool, and was therefore not on the radar for big studios at all. It then changed somewhat to become a sculpting application, and it offered something that no other commercially available tool at the time did. Hence, it was picked up by studios.
With renderers, the same cannot be said. At least, not to a large degree. Renderers all do more or less the same thing, they just have different implementations, workflows and approaches. Truly unique features in renderers these days are quite rare, thus making studio adoption of the tool quite different.
In addition to this, ZBrush does something which can far more easily be incorporated into a complex studio pipeline than a renderer. So it’s not an appropriate comparison.
Over the last ten years we’ve seen numerous new renderers emerge in the market, and yet throughout, Renderman has stayed steadily as the main choice in big studios. There is no compelling reason to suggest that this will change in the near future, for all the reasons I’ve already stated.
I don’t know why you’re so determined to argue against this. There is no way to say this without sounding really pompous, so please forgive me in advance, but I can only imagine that you’ve never actually worked in any big film studio. Otherwise you wouldn’t be arguing like this.