Public Relations Management in Organisations

In week 7's readings,
"Early systems theory (von Bertalanffy, 1968) suggested that an organisation and its environment were separated by a boundary through which information and resources flowed. Spanning this boundary was seen as a critical role for public relations professionals, who would provide information to the environment about the organisation and bring information about the environment back to the organisational decision makers. The practitioner monitored the boundary on an ongoing basis, with 'one foot in the organisation and one foot outside' (Grunig and Hunt, 1984:9)."

Perhaps without the PR practioner, organisations still are able to explore this 'boundary' if they would spend more resources to go into this area of exploration and research. I guess people saw this and expanded this area, which could potentially attract organisations that are not willing to spend a great deal of resources to explore this area.
So am I right to say, PR practioners are not needed at all?