I would argue that technical communicators participate in shaping society anytime they offer original viewpoints, methods, technologies, or materials that affectthe way we work.
Technical communicators shape society through their field by shaping the way information is interpreted by society. I support this opinion because they provide points of view in their work that others might not have thought of and help jumpstart the intellectual process or problem-solving process for those who use their work.
An example of this would be someone using a help-guide for a computer they bought. They don't know how to solve the issue themselves, they read the guide, they process that information and they apply it to their problem.