Why is the work of the committee on public information during world war considered propaganda?

The Committee on Public Information, was an independent agency of the government of the United States created to influence U.S. public opinion regarding American participation in World War I. Over just 28 months, from April 14, 1917, to June 30, 1919, it used every medium available to create enthusiasm for the war effort and enlist public support against foreign attempts to undercut America's war aims. It primarily used propaganda techniques to accomplish these goals. The purpose of the CPI was to influence American public opinion toward supporting U.S. participation in World War I via a prolonged propaganda campaign. The CPI at first used material that was based on fact, but spun it to present an upbeat picture of the American war effort. In his memoirs, Creel claimed that the CPI routinely denied false or undocumented atrocity reports, fighting the crude Propaganda efforts of "patriotic organizations" like the National Security League and the American Defense Society that preferred "general thundering" and wanted the CPI to "preach a gospel of hate.